US2063676A

US2063676A - Ingot stripper

Info

Publication number: US2063676A
Application number: US48740A
Authority: US
Inventors: Hively Ossian
Original assignee: MORGAN ENGINEERING CO
Current assignee: MORGAN ENGINEERING CO
Priority date: 1935-11-07
Filing date: 1935-11-07
Publication date: 1936-12-08
Anticipated expiration: 1953-12-08

Description

Dec. 8, 1936. o. HNELY 2,063,676

INGOT. STRIPPER Filed Nov. '7, 1955 6 Sheets-Sheet l Hit/ely www# Oss z'cw Dec. 8, 1936. Q H|VE| Y 2,063,676

INGOT STRIPPER Filed Nov. '7, 1935 6 Sheets-Sheet 2 Dec. 8, 1936.

O. HIVELY lINCIQT STRIPPER Filed Nov. 7, 1955 6 Sheets-Sheet 3 81936. o. HIVELY 2,063,675

INGOT STRIPPER Filed NOV- '7, 1955. 6 Sheets-Sheet 5 Il I .2L

- 0.55m Hai/e III JS v .0. HIVELY Dec. 8, 1936.

INGOT STRIPPER Filed Nov. 7, 1935 l 6 Sheets-Sheet 6 ss zal?, 5i/e@ Patented Dec. 8, 1936 PATENT OFFICE INGOT STRIPPER Ossian Hively, Alliance, Ohio, assignor to The Morgan Engineering Company, Alliance, Ohio Application November v7, 1935, Serial No. 48,740

16 Claims.

This invention relates to improvements in ingot strippers and more` particularly to an ingot stripper of universal application capable of stripping standard, flush type-or hot-top ingots from molds.

As is well known, there are three principal types of ingot molds used at present. First, the standard or small-end-up type, which has been used for a great many years and which is still used for probablyY 80% of the ingot output. The second type of ingot mold is what is known as the ush or big-end-up type. With this type the ingot must be stripped Vupwardly from the mold. The third type of ingot mold is what is known as the hot-top or big-end-up type, and in this case the ingot mustalso be stripped upwardly from the mold. The primary object oi the present invention is to provide a machine which is capable of stripping all three types of ingots, without the application or the removal of any parts from the machine. All of the functioning is controlled by the cage operator and requires very little more operating mechanism than has been used heretofore.

A further object is to supply an attachment for a specific purpose. In reference to this it will be noted that after the molds have been stripped from small-endup or standard ingots, it is found that some of the ingots have fused fast to the stools and it then becomes necessary to detach the ingots from the stools. By the use of my auxiliary attachment, such ingots may be removed from the stools.

With the foregoing objects outlined and with other objects in view which will appear as the description proceeds, the invention consists in the novel features hereinafter described in detail, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims.

In the drawings:

Fig. 1 is a vertical sectional view of the essential parts of my universal stripping mechanism and showing the mechanism in position to descend on a standard type mold having an ingot therein.

Fig. 2 is a similar view with the parts lowered intoposition to `start the liftingof the mold from the ingot. v

Fig. 3 is a similar view of the mechanism shown ready to lift a flush type ingot and mold from `the car on which the ingot has been poured.

. ,Fig 4 is a like View with the ingot mold set down on a conventional basket.

Fig. 5 is a vertical sectional view of the mechanism and showing the parts in the positions which ythey occupy' after the mold has been pushed downwardly from the ingot and with the ingot in raised position ready to be lifted out Qfihsmoli Fig. 6 is a Vertical sectional view taken at right angles to the views shown in Figs. 1 to 5 inclusive, and showing the tongs of the mechanism ready to lift a hot-top ingot from its mold.

Fig. '7 is a similar view with the hot-top ingot partially raised from the mold.

Fig. 8 is a side elevation of the mechanism.

Fig. 9 is a vertical sectional View partly in ele'- vationV of the mechanism combined with a horseshoe member for use when the mechanism is employe-d to detach an ingot from its stool.

Fig. l0 is a side elevation of a portion of the mechanism shown in Fig. 9.

Fig. 11 is an elevation partly in vertical section of the mechanism and illustrating how the tong support is held in elevated position at certain times with the tongs in open position.

Fig. 12 is a top plan View of this detail partly in horizontal section, the section being taken on line I2--I2 of Fig. 13.

Fig. 13 is a view similar to Fig. 11 but taken at right angles thereto.

Referring to the drawings, I4 is a housing which is suspended by known means (not shown) from the trolley of the crane. A rotatable shaft I5 extends from the trolley into the housing and the latter contains an upper nut I6 engaging threads I1 on the shaft. Within the housing there is a second lower nut I8 engaging the threads I9 of the shaft, and as the threads I'l and I9 are oppositely pitched, it will be understood that when the shaft is turned, the housing I4 will move in one direction and the nut I8 will move in the opposite direction. By means of such instrumentalities certain parts are caused to push downwardly While other parts are lifting, in order to take care of the various types of molds.

Arms 20 are suspended from the lower end of the housing by means of pivot pins 2I and each arm consists of side members 22 joined at their lower ends by a cross member 23. Abutments 24 on the inner edges of the arms are provided for a purpose hereinafter described. Thus itl will be noted that if the abutments are resting on the top of a mold and the housing I4 is moved downwardly by turning the shaft I5 in one direction, the arms 22 will have a tendency to move the mold downwardly. On the other hand if the lugs of a mold are resting on the cross members 23 of the arms and the housing I4 is raised by turning the shaft I5 in the opposite direction, the arms 20 will act to lift the mold.

The swinging of the arms may be controlled in the following way. Each arm is in the form of a bell crank lever and the upper arm 25 of this lever is pivotally connected at 26 to a link 21 carried by a sheave 28 that is suspended from a cable (notshown) depending from the crane trolley.

Of course, when the cable is wound, the sheave will be moved upwardly and this will cause the arm 20 with which it is associated to move outwardly about its pivot 2 I. In order to positively close the armsseach link 21 has a slot 29 through which extends a pin 36 at one end of a lever 3I pivotally mounted at 32 on a cross head portion 33 of the housing. The other end of the lever is connecte-d at 34 to a sheave 35 that is also suspended by a cable from the crane cage and obviously if this cable is raised, the sheave 35 through the instrumentality of the lever 3| will depress the link 21 and cause the arm 20 with which it is associated to move inwardly. Guide pins or

posts

36 and 31 project upwardly respectively from the

sheaves

28 and 35 and they extend through guide apertures in a web 38 near the upper end of the housing.

It will be readily understood that the two sheaves 28 are to be moved in unison for opening the arms 20 and the two sheaves 25 are to be moved in unison for closing the arms.

The lower nut I8 supports the tubular extension 39 of a ram 40 which is employed in pushing downwardly on an ingot, to remove the same from a big-end-down mold. The ram reciprocates in the Vertical tubular portion 4l of the housing and it is provided with a shelf 42 that supports lugs 43 extending through vertical slots 44 in the sides of the tubular portion of the housing. The lugs are rigidly united with a yoke 45 carrying pivot pins 46 for a pair of legs 41. These legs are similar tothe arms 20 in that each leg consists of a pair of side members 48 joined together at their lower ends by a cross member 49 designed to act as a hook in lifting an ingot stripping basket hereinafter described. The legs are moved inwardly and outwardly by bell crank levers 50 pivotally mounted on the fulcrum pins 2l. The lower end of each of these bell crank levers is provided with a roller I that rolls in a guideway 52 at the side of the leg. Of course, if the rollers 5I roll downwardly in the guideways 52, the lower ends of the legs 41 move toward one another, but if the rollers move upwardly, the arms spread apart. A link 53 is pivotally connected at 54 to the upper arm of each of the bell crank levers 50 and this link is guided at 55 by the cross head 33 and is connected to a sheave 56 having a guide post 51 extending through the spider 38. The sheave 56 is also suspended from a cable that is controlled from the crane cage,

The parts thus far described may be employed for stripping standard or flush type molds. For example, in stripping a standard or small-end-up mold from an ingot, as illustrated in Figs. 1 and 2, the entire stripping mechanism is lowered over the mold 58 until the arms 20 are in position to engage the lugs 59 at the sides of the mold whereupon the shaft I5 is revolved to cause the threads I1 to exert an upward force on the nut I6, it in turn on housing I4, and it in turn on the arms 2D. The lower threads I9 will simultaneously cause the nut I8 to exert a pressure downward on the plunger or bull head 40, which engages the top of the ingot 66 and holds it down while the arms 20 lift the mold oi the ingot car 6 I.

Owing to the slots 44 being shorter than the tubular portion 4I of the housing, the arms 41 will not descend with the bull head but these arms will be suported by the lugs 43 which rest on the lower ends of the slots.

In stripping a ush type or big-end-up mold from an ingot, as shown in Figs. 3 to 5 inclusive, the entire mechanism is lowered'and the arms 20 are then brought into engagement with the lugs 62 of the mold 63. Then the entire mechanism is raised to lift the mold and ingot from the ingot car 64 and subsequently the mechanism is lowered (Fig. 4) so as to introduce the lower end of the mold into a basket 65 on another car 66. When the mold is lowered into the basket, a wedge pin 61 projecting from the bottom of the mold comes into engagement with the upper surface of the basket and supports the ingot 88 in an elevated position while the mold continues to descend due to its own weight. In a large percentage of molds, especially when new, the weight of the mold, through the force of gravity, is suflicient to strip the mold from the ingot. In case of a sticker the legs 41 are brought into engagement with lugs 69 at opposite sides of the baskets, and the abutments 24 at the inner edges ofthe arms 20 are brought to bear on the top of themold. Now the shaft I5 is turned in a direction opposite to that in Figs. 1 and 2 with the result that the upper threads I1 force the nut I6, housing I4, fulcrurn pins 2I and arms 20 downwardly while the lower threads I9 lift the nut I8, the bull head 40, lugs 43, yoke 45 and arms 41, to raise the basket 59 and the pin 61 while the mold is descending.

In order to handle hot-top ingots, the mechanism includes the following additional elements, see Figs. 6 to' 8 inclusive. Pivot pins 10 are arranged at right angles to the pivot pins ZI and 46, and are supported by a yoke 1I that is slidably mounted on the tubular portion 4I of the housing. Tongs 12 are pivotally mounted on the pins and have spurs 13 at their lower ends to engage the hot-top 14 of an ingot 15 while supported in its mold 16 on an ingot car 11. Each tong has rollers 18 at its upper end and the rollers of the tongs roll in downwardly diverging tracks or guideways 19 formed at opposite sides of yoke 45. It will be recalled that this yoke through the instrumentality of the lugs 43 is supported by the bull head 46 which in turn is actuated by the lower threads I9 of the shaft I5. Obviously then if the shaft is turned in a direction to lift the bull head, it in turn will lift the yoke 45, and owing to the divergency of the tracks 19, the spurs 13 will rst be brought into engagement with the upper end of the ingot and then as the yoke 45 continues upwardly the ingot would be lifted out of the mold. For the purpose of preventing the mold from rising during this stripping action, the abutments 24 at the inner edges of the arms 20 are brought to bear on the top of the mold as shown in Fig. 8 and, of course, as the arms 20 are carried by the housing I4 and thel housing is moved downwardly while the yoke 45 is rising, the mold cannot rise with the ingot.

From the foregoing, the methods of using my mechanism for stripping various types of ingots from molds may be readily understood, and in order to employ such mechanism for detaching a standard type ingot from its stool, I` use.y an auxiliary attachment shown in Figs. 9 and l0. This attachment is in the form of a horseshoe 80 and the head 8| thereof has an aperture 82 to accommodate the bull head 40 while the legs 83 of the horseshoe have lugs 84 that may be engaged'by the cross members of the arms 20. This horseshoe, when not in use stands in a vertical position, being heldv so by its legs resting in holes in a suitable support. When the horseshoe is needed, the 'crane is brought to a position over it, and the entire mechanism is lowered until the arms 20 are brought into position to engage the lugs 84. Then these arms are moved toward one-an- "als other by the mechanism heretofore described, until the arms grip the lugs 84 as shown in Fig. 9.

As each arm 20 consists of two side pieces joined at their lower ends by the cross member 23 and the cross members engage the horseshoe beneath the lugs 84 and hold it up against the lower end of the housing I4, the side members of the arms will enclose the horseshoe suiiiciently to keep it in vertical alignment when it is employed. In using it, the stripping action is the same procedure as pointed out in the hot-top stripping, the upper threads I1 exert a downward force on the nut I6, the housing I4 and the horseshoe 8D. As the latter abuts: against the ingot stool 85, of course, that stool will be prevented from rising. At the same time the lower threads I9 exert an upward force on the nut I8, ram and yoke 45, and as the latter moves upwardly it will cause the diverging tracks 19 (Figs. 6, 7 and 8) to operate the tongs 12 for lifting the ingot 86 from the stool tov which it has been fused during the pouring operation.

It will be evident to those familiar with the operation of stripper cranes that in stripping actions Where the tongs 12 are not used, provision must be made tol keep them in an open position where they will not interfere with the ingot. As already pointed out in the description of hot-top strippingv (Figs. 6, 7 and 8), the raising of the yoke causes the tongs 12 to close. However, as the legs 41 are also suspended from this yoke and in flush topi stripping as it is necessary to raise the legs 41, it becomes necessary to hold the tongs 12 out of the way. In order not to complicate the illustration, the detail for accomplishing this is illustrated in Figs. 11 to 13 inclusive. As herev shown, the yoke 1I which `carries the tong fulcrum pins 10 may be latched to the yoke 45 in thefollowing way. A pair of latches 9i) are pivoted on the pivot pins 46 and their upper ends are pressed outwardly by springs 9| which are placed between the yoke 45 and the upper ends of the latches. The lower ends of the latches are equipped with detents 92 to detachably engage abutments 93 on the yoke 1I. Obviously when the latches are in engagement with such abutments the yokes 45 and 1I move in unison and as the upper ends of the tongs are at this time held in the upper ends of the tracks 1.9, the tongs will be maintained in open position.

In order that the latches may be simultaneously released, levers 94 are provided. These levers are mounted on vertical pivot pins 95 at opposite sides of the yoke 45 and their outer ends engage the outer faces of the upper ends of the latches 9D. The other end of one of the levers is pivotally connected at 96 to a link 91 that is in turn connected to a rocking lever 98. A link 99 connects one end of the rocking lever to the other end of the opposite lever 94. The rocking lever may be actuated from the crane cage by a shaft I. Obviously when the rock shaft is turned in the proper direction, the latches will be actuated, to release the abutments 93 and then the yoke 45 can operate without raising the yoke 1I, and the latter at this time will rest on the lower end of the housing I4.

It is believed that the construction, operation and advantages of my improved stripping ,mechanism may be readily understood from the foregoing description and it is manifest that changes may be made in the details disclosed without departing from the spirit of the invention as expressed in the claims.

What I claim and desire to secure by Letters Patent is:

l. A stripping mechanism comprising a housing, a bull head, means for simultaneously moving the housing and bull head in opposite directions, arms carried by the housing and' adapted to exert either upward or downward pressure on a mold, and legs moved by the bull head and adapted to cooperate with the arms in stripping an ingot from a mold, said legs extending downwardly below the arms and having hook receiving portions at their lower ends.

2. A strip-ping mechanism comprisinga housing, a bull head, means for simultaneously moving the housing and bull head in opposite directions, arms carried by the housing and adapted to exert either upward or downward pressure on a mold, legs movable by the bull head and adapted to cooperate with the arms in stripping an ingot from a mold, said legs extending downwardly below the arms and having hook receiving portions at their lower ends, means for moving the lower ends of the arms inwardly and outwardly, said means including a link connected to one of said arms and sheave means connected to the link.

3. A stripping mechanism comprising a housing, a bull head, means for simultaneously moving the housing and bull head in opposite directions, arms carried by the housing and adapted to exert either upward or downward pressure on a mold, legs movable by the bull head and adapted to cooperate with the arms in stripping an ingot from a mold, said legs extending downwardly below the arms and having hook receiving portions at their lower ends, means` for moving the lower ends of. said arms inwardly and outwardly, said means including a link connected to one of said arms, a sheave connected to the link and adapted to be raised and lowered, said link having a slot, a rocking lever mounted on the housing and having a pin engaging the slot and another sheave connected to said lever and adapted to be raised and lowered.

4. A stripping mechanism comprising a housing, a bull head, means for simultaneously moving the housing and bull head in opposite directions, arms carried by the housing and adapted to exert either upward or downward pressure on a mold, legs movable by th-e bull head and adapted to cooperate with the arms in stripping an 'ingot from a mold, said legs extending downwardly below the arms and having hook receiving portions at their lower ends, means for moving the lower ends of said arms inwardly and outwardly, said means including a link connected to one of said arms, a sheave connected to the link and adapted to be raised and lowered, said link having a slot, a rocking lever mounted on the housing and having a pin engaging the slot and another sheave connected to said lever and adapted to be raised and lowered, said sheaves being guided by said housing.

5. A stripping mechanism comprising a housing, a bull head, means for simultaneously moving the housing and bull head in opposite directions, arms carried by the housing and adapted to exert either upward or downward pressure on a mold,'legs movable by the bull head and adapted to cooperate with the arms in stripping an ingot from a mold, said legs extending downwardly below the arms and having hook receiving portions at their lower ends,` and means for moving the lower ends of. the legs toward and away from one another, said means including a guideway on one of the legs, a rocking lever having a guide element guided by the guideway, a. link connected to the lever for moving the latter, and a sheave connected to the link and adapted to be raised and lowered.

6. A stripping mechanism comprising a housing, a bull head, means for simultaneously moving the housing and bull head in opposite directions, arms carried by the housing and adapted to exert either upward or downward pressure.A on a mold, legs movable by the bull head and adapted to cooperate with the arms in stripping an ingot from a mold, said legs extending downwardly below the arms and having hook receiving portions at their lower ends, tongs mounted on the housing and arranged at opposite sides thereof, and means for operating the tongs from the bull head.

'7. In stripping mechanism of the character described a housing, a bull head, means for simultaneously moving the housing and bull head in opposite directions, said housing having slots, a member having portions projecting through the slots and normally resting on the lower ends of the slots, said bull head being engageable with said portions for lifting said member but the bull head being movable downwardly below said portions to allow the bull head to descend independently of said member, and stripping elements carried by said member.

8. In stripping mechanism of the character described a housing, a bull head, means for simultaneously moving the housing and bull head in opposite directions, said housing having slots, a member having portions projecting through the slots and normally resting o-n the lower ends of the slots, said bull head being engageable with said portions for lifting said member but the bull head being movable downwardly below said portions to allow the bull head to descend independently oisaid member, and stripping elements carried by said member, said stripping elements comprising pivotally mounted legs and means for actuating said legs.

9. In mechanism of the character described a housing and a bull head, means for simultaneously moving the housing and bull head in opposite directions, arms pivotally suspended from the housing and having mold engaging portions, and legs movable upwardly with the bull head and having ingot basket engaging portions, said legs extending downwardly below said arms.

10. In stripping mechanism of the character described a housing having a tubular portion, a bull head movable in said tubular portion, means for simultaneously moving the housing and bull head in opposite direction, first yoke surrounding the tubular portion and mounted on the housing, tongs pivotally mounted on the yoke, a second yoke surrounding the tubular portion and mounted on the housing and movable with the bull head for actuating said tongs, and means carried by the housing for pressing downwardly on a mold while the tongs are lifting an ingot from the mold.

1l. In stripping mechanism of the character described a housing, a bull head, means for simultaneously moving the housing and bull head in opposite directions, a rst yoke mounted on the housing, tongs pivotally mounted on the yoke, a second yoke mounted on the housing and movable with the bull head for actuating said tongs, means carri-ed by the housing for pressing downwardly on a mold while the tongs are lifting an ingot from the mold, and releasable latching means for connecting the yokes together.

12. In stripping mechanism of the character described a housing, a bull head, means for simultaneously moving the housing and bull head in opposite directions, a first yoke mounted on the housing, tongs pivotally mounted on the yoke, a second yoke mounted on the housing and movable with the bull head for actuating said tongs, means carried by the housing for pressing downwardly on a mold while the tongs are lifting an ingot from the mold, means supported by the second yoke and engageable with an ingot stripping basket, and means for latching the yokes together.

13. In ingot stripping mechanism of the character described comprising a housing, a bull head, means for simultaneously moving the housing and bull head in opposite directions, a first yoke mounted on the housing, tongs pivotally mounted on the yoke, a second yoke mounted on the housing and engaging said tongs for closing and raising the latter, said second yoke normally resting on the housing but being movable upwardly with the bull head, ingot basket engaging means carried by the second yoke, and means for latching the two yokes together whereby the irst yoke may rise with the second yoke independently of the housing.

rso

14. An ingot-stripping machine for use in stripq ping standard, 'Hush or hot-top ingots from molds comprising a housing, a bull plug, means for simultaneously moving the housing and bull plug in opposite directions, mold-engaging arms pivotally suspended from the housing, means mounted on the housing for use in moving the lower ends of the arms toward or away from one another, a yoke slidably mounted on the housing and carrying ingot-engaging tongs, a second yoke slidably mounted on the housing and provided with means for actuating said tongs, said second yoke being movable upwardly with the bull head, means for latching the two yokes together whereby the tongs may be held in upward position and may be raised with the second yoke, ingot stripping basket engaging legs pivotally connected to the second yoke, and means for moving the lower ends of said legs toward and away from one another.

15. In ingot-stripping mechanism a housing, a yoke, means for simultaneously moving the yoke and housing in opposite directions, a horseshoeshaped member depending from said housing and adapted to span a mold and rest on the stool thereof, arms depending from the. housing and releasably embracing said horseshoe-shaped member and tong arms engageable with the ingot and actuated by said yoke for raising the ingot while the horseshoe-shaped member is pressed downwardly by the housing.

16. In stripping mechanism of the character described a housing, a yoke, means for simultaneously moving the. housing and yoke in opposite directions, a horseshoe-shaped member depending from the housing, means carried by the housing and embracing the horseshoe-shaped member f OSSIAN HIVELY.