US3117354A - Collapsible dore for forming hot top in ingot molds - Google Patents

Description

H. BLESER 3,117,354

COLLAPSIBLE CORE FOR FORMING HOT TOP IN meow MOLDS Jan. 14, 1964 Filed May 29, 1962 2 Sheets-Sheet 1 INVENTOR. HERIBERT BLESER FIG.6

ATT YS.

Jan. 14, 1964 H. BLESER 3,117,354

COLLAPSIBLE CORE FOR FORMING HOT TOP IN INGOT MOLDS vFiled May 29, 1962 2 Sheets-Sheet 2 4 A? /4 /3 a A? 9 I I //-11| I J1 J6 INVENTOR. I W34 /9 ERIBERT BLESER FIG.5 6 H ATT YS.

United States Patent 3,117,354 CQLLAPSTBLE (CQRE FUR FURMING HQT Till lhl KN G61" MQLDS Herihert Bleser, Oherhausen, Rhineiand, Germany,

assignor to Huttenwerli Qherhausen, Uherhausen,

Germany Filed May 29, 1962, Ser. No. 198,6tl6 Claims priority, application Germany June 23, 1961 4 Claims. (0. 22-9) Especially when producing cast steel ingots, the formation of cavities and segregations in the ingot is reduced, as is known, by using so-called hoods or hot tops. The hoods of ingot molds frequently consist of fire bricks, with which the upper part of the mold is built, and they may also be taken off. Instead of fire bricks fireproof tampable material has recently been used which is tamped down between the mold wall and a device for shaping a hood on the ingot mold, which device is removably positioned in the ingot mold and which serves as a master mold. Specifically, such a device for producing hoods for casting or ingot molds is ko-wn, Which consists of chamber forming thin iron plates or segments which are fastened to a support, and which plates can be moved towards the wall of the ingot mold, and which are adjusted to engage the ingot mold wall. By pressing down a bar, with joint-arms fastened axially towards the ingot mold these chamber forming iron plates are at the same time pressed towards the inner wall of the ingot mold, so that the chamber is provided which receives the tamped material. After the material has been tamped in and has become solid, the above-mentioned device for producing the hoods on the ingot molds is folded up by lifting the axial bar and is pulled out. The molding iron plates are resiliently connected from the inside of the abovementioned device by chains, rubber, springs, and the like in order that there is no play or space between individual iron plates. These above-mentioned devices are, however, not free from disadvantages, as for example, the complete structure, and, moreover, its handling are complicated. This is due, especially, because the devices have a considerable number of delicate joints, not adapted to the rough foundry work and are subject to troubles. Even slight twists of the joint-arms or of the iron plates cause leakages through which, when the loose material is being tamped in, parts of the tamped material get into the interior of the ingot mold, which causes the soiling of the ingot mold and which makes a special frame with changeable feet necessary, a frame, in which the axially movable bar is held. The settin up and the adjusting of the frame means detailed work.

The inventor made it his task to create a device for producing hoods for ingot molds, and with which the hoods can be produced in the simplest way.

The invention provides a device for producing hoods for ingot molds, the device consisting of iron plates which are fastened to a support so that the plates can be moved toward the walls of the ingot mold, and which plates are adjusted to the contour of the ingot mold. The invention is as follows: The support consists of a frame which can be put on the rim of the ingot mold and is essentially rectangular, and the iron plates can be moved in and out on the frame toward the walls of the ingot mold.

In particular the invention can be practiced in different ways. For instance, one embodiment of the invention is as follows: The iron plates are made in two half-hoods having integral flanges at their lower edges which flanges engage the walls of the ingot mold. Also, side-closingwalls are used with the half hoods. According to this preferred embodiment, the side-closing-walls are fastened to special stand-bars, which are held in the rectangular frame, and so that the side-closing-walls can be moved in and out on the frame, and the side-closing-w alls also can be swung on the stand-bars.

The advantages achieved by this invention are to be seen in the fact that by this device hoods for ingot molds can be produced in the simplest way, as will be explained by the drawings hereinafter, with respect to the job that is to be done. Especially the handling of the device, according to the invention, is simple because the frame by which the iron plates are held has only to be put on the rim of the ingot mold to make the device ready for service. Additionally, the way of operating the device is simple and the device will stand up under the rough foundry work because of its simplicity. The result is that the device of the invention excels because of its simplicity, increased security against accidents, =and stability, as well as because it is less subject to trouble. A special advantage is the fact that there are no joints which are complicated and subject to trouble.

In the following pages the invention is described more in detail with reference to drawings showing only one embodiment.

The drawings are as follows:

FIG. 1 shows a device for producing hoods for ingot molds according to the invention, the drawing not showing an ingot mold, but illustrating the device in the expanded position.

PEG. 2 shows the structure according to FIG. 1 but in the collapsed position.

FIG. 3 shows a section on line AA through the structure of FIG. 1 with the ingot mold shown.

FIG. 4 shows a section on line BB through the structure of FIG. 1, also with the ingot mold shown.

FIGS. 5 and 6 are top views of adjustable plates 5 and l.

The device shown in the [drawings is good for producing hoods for ingot molds, and in its fundamental structure consists of a support with iron plates 1 fastened to it which plates can be moved towards the walls of the ingot mold and which are shaped and adjusted to the form of the ingot mold. Specifically the support consists of a frame 2, which can be put on the rim of the ingot mold, which frame is essentially rectangular, and the iron plates 1 can be moved in and out towards the walls of the ingot mold on this frame. In FIG. 2. the arrows indicate such movement in and out. The iron plates 1 are, as shown in the drawing, two half-hoods, which have an inner sealing flange integral with the lower edge of each plate, which flanges engage the walls of the ingot mold and which flanges may, for example, be made by bending them out from the plate. Additionally, sideclosing w alls 5 are provided having sealing flanges 4, the walls 5 adjoining the half-hoods 1. In order to show these clearly one of the half-hoods l is broken away in FIGS. 1 and 2.. Thus, one can see that the side-closingwalls 5 in the example shown are fastened to the special stand-bars, which are held by the rectangular frame 2, and so that the walls can be moved in and out with the stand-bars and :so that the walls can be swung or turned on the stand-bars around the axis thereof.

When the side closing walls 5 are moved in or collapsed, which is done by pulling back the stand-bars 6, the stand-bars 6 fastened parallel side by side to effect an eccentric mounting automatically allow the walls 5 to swing in around the taxes 7 which is effected by the pivotal fastening of the bars to the walls, with the walls being received in the interior of the half-hoods, which can be then moved towards each other (see FIG. 2).

When expanded or moved out the self-closing walls have the position shown in FIG. 1. The stand-bars 6 are for moving the side-closing-walls, and the bars are pulled in and out in the direction of the arrows 8. These standbars 6 are held in and moved on the frame 2 in eyes 9 or tubes or like elements carrying locking screws 13 which provide for fastening the stand-bars 6 when they are moved to outwardly expanded position. In a similar way the half-hoods can be mounted for movement on the frame 2 in the direction of the above-mentioned arrow 3 by means of tubes, eyes, or the like, and the half-hoods can be locked in position by means of screws 14.

Thus, the device according to the invention can, as FIGS. 3 and 4 indicate, be put in an ingot mold and can be expanded towards the walls of the ingot mold thereby producing a chamber or space 12 which can be filled with the tamped material; after the material has been tamped and set it is easy to collapse or fold up the iron plates, so that the device can be lifted upwards out of the ingot mold so that it can be used again as desired.

The device according to the invention for producing hoods for ingot molds can be further improved in that the half-hoods and side-closing-walls each can be composed of partial pieces which can be fastened adjustably together from the inside with screws; thus alterations of the side length of all of the above-mentioned iron plates is possible to adapt the device to diiterent ingot mold sizes.

More specifically, FIG. shows plate 5 made as halves 5a and 5b having overlapping flanges 4a and 4b. A backing plate 56 is provided having slots 5d and 5e through which extend thumb screws 17 and 18 received in tapped holes in plates 5a and 51; respectively so that adjustment can be made. Stand-bars 6 are pivotally secured to the center of backing plate 50.

PEG. 6 shows plate 1 made in three parts, a central part in and two end parts lb and 1c having overlapping flanges 4a, 4b, and 4c. Thumb screws 19' and 24) extend through holes in the ends of the central part in, through slots 21 and 22 and into nuts (not shown) so that adjustment as to length of the plate can be made. The plates for slidably receiving the rods 2 are mounted on the central part la.

The adjustableness of the length of the iron plates 1 and 5 has the further advantage that if in case of need the inner walls of the ingot mold are worked on by being machined or the like so that the measurements of the cavity of the ingot mold are changed, the device can still be made to fit the cavity.

Therefore, it normally is suificient to provide only one standard size of the device according to the invention for a certain type of ingot mold, since this can in the simplest way be adjusted to the measurement prevailing at any given time of the cavity of the ingot mold.

What is claimed is:

1. Apparatus removably defining an endless horizontal molding chamber at the upper end of an ingot mold cavity and including a frame adapted to rest on the top of an ingot mold, two members of inverted half-box shape slidably supported on the frame and movable from a collapsed position adjacent to each other to an expanded position in chamber defining engagement with the ingot wall, plates for closing the end spaces between the members when in expanded position, bar means slidably received in the frame and eccentrically and pivotally supporting the plates so that the plates automatically pivot upon operation of the bar means from the chamber defining expanded position to relation parallel to said members in a collapsed position, means on the frame for locking the plates and members in the expanded position, and outwardly directed flange means along the bottom of the members and plates and engaging with the ingot walls in sealing relation therewith and holding the members and plates in endless chamber forming spaced relation with the ingot walls.

2. In a device for assisting in forming a ring of insulating material around the upper inside of an ingot mold, the combination of a frame adaptable to extend over the top edges of the mold to provide support, a first pair of iron plates positioned parallel to each other and slidably carried by said frame, said plates being adjustable to the shape of the inside surface of the mold and movable from a collapsed position adjacent to each other to an opposed spaced position in engagement with the mold walls, a second pair of iron plates, bar means slidably and pivotally supporting the second pair of plates on the frame for movement to and from a collapsed position acutely inclined to the first pair of plates to an expanded position in engagement with the mold walls and at right angles to the first pair of plates, the plane of all of said plates being substantially vertical, outwardly directed flange means on the bottom edges of said plates adapted to engage the inside surface of the mold when the device is expanded to provide together with the plates an endless chamber open at the top only into which loose hood forming insulating material can be tamped.

3. A device according to claim 2, which is characterized by means mounting each plate of the second pair of plates eccentrically and rotatably on a separate bar of the bar means so that upon movement of the separate bars of the bar means the second pair of plates move automatically from a position acutely inclined to the first pair of plates in a fully collapsed position to an essentially perpendicular relation to the first pair of plates in the expanded position.

4. A device according to claim 3 wherein each of the pair of plates comprises at least two partial pieces, means adjustably fastening the pieces together so that the length of the plates can be adjusted to conform to the inside measurements of the mold, and end means on the first pair of plates overlapping the second pair of plates with the device in expanded position to allow for further adjustment of the device to a particular mold size.

References Cited in the file of this patent UNITED STATES PATENTS l,24-4,937 Zagelmeyer Oct. 30', 1917 1,593,771 Linthwaite July 27, 1926 2,818,627 Blasius et a1. Jan. 7, 1958 3,077,646 Tigerschiold Feb. 19, 1963 FOREIGN PATENTS 885,436 Great Britain Dec. 28, 1961

Claims (1)

1. APPARATUS REMOVABLY DEFINING AN ENDLESS HORIZONTAL MOLDING CHAMBER AT THE UPPER END OF AN INGOT MOLD CAVITY AND INCLUDING A FRAME ADAPTED TO REST ON THE TOP OF AN INGOT MOLD, TWO MEMBERS OF INVERTED HALF-BOX SHAPE SLIDABLY SUPPORTED ON THE FRAME AND MOVABLE FROM A COLLAPSED POSITION ADJACENT TO EACH OTHER TO AN EXPANDED POSITION IN CHAMBER DEFINING ENGAGEMENT WITH THE INGOT WALL, PLATES FOR CLOSING THE END SPACES BETWEEN THE MEMBERS WHEN IN EXPANDED POSITION, BAR MEANS SLIDABLY RECEIVED IN THE FRAME AND ECCENTRICALLY AND PIVOTALLY SUPPORTING THE PLATES SO THAT THE PLATES AUTOMATICALLY PIVOT UPON OPERATION OF THE BAR MEANS FROM THE CHAMBER DEFINING EXPANDED POSITION TO RELATION PARALLEL TO SAID MEMBERS IN A COLLAPSED POSITION, MEANS ON THE FRAME FOR LOCKING THE PLATES AND MEMBERS IN THE EXPANDED POSITION, AND OUTWARDLY DIRECTED FLANGE MEANS ALONG THE BOTTOM OF THE MEMBERS AND PLATES AND ENGAGING WITH THE INGOT WALLS IN SEALING RELATION THEREWITH AND HOLDING THE MEMBERS AND PLATES IN ENDLESS CHAMBER FORMING SPACED RELATION WITH THE INGOT WALLS.

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