DE2032368A1 - Warm hood arrangement - Google Patents

Description

DR, E. WIEGAND DIPL-ING. W. NIEMANN

DR. M. KÖHLER DfPL-ING. C. GERNHARDT 2 Ü 3 2 368.

MÖNCHEN · HAMBURG

555476 8G0O Munich is / jo. June 1970

TELEGRAMS: KARPATENT NUSSBAUMSTRASSE 10

V. 14941/70 7 / de

. Foseco Trading A. G. Ohur, Graubünden (Switzerland)

Warming hood arrangement

PIe invention, relates to heating hoods or casting

skins for-bli> 3lcforiaen iiad similar loraies «

represents Slnfac? '"routing convenience, the 2 & findiing- below with Beziig on DA® lining described by Slookformlcöpfen vir £ _r IET apparent' d & ß heat hoods oder.Gießhauben in the same manner to Auskleiäsn rom (tuiBsmimlbze® or head aufaätsea find fUr.Blooicforaien.AQwedduag can.

§Ie # ea τοπ flowers or plates te ».H & tall is © e 'übliojQ; Say lopfmetali thermally insulate sm to. it i SSE aalten »wäfcesd the .Meteli eat the body see

1098U / 1-388

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solidifies and shrinks, and so a specialist feed of molten metal sur Kompensieruag the shrinkage and to reduce the formation of voids to a minimum. This thermal insulation is preferred wisely obtained by covering the inside of the block mold at its head with a layer of heat insulating refractory Lining Material «This layer can be formed in place, but it is common practice the layer from an Ansah! of preformed shapes to be made from heat-insulating material

A common way of lining rectangular block shapes is to use ₉ four insulating panels, one of which extends over each side wall, and four corner wedges, “with each piece representing the complete block head lining. The panels are nailed in place raid AiateiBgeia by straps or similar method fastened ₉ rad the wedges are driven between them to fix the construction in progress «,

To simplify the construction and arrangement

of such Kopfauskleidmageia is versteht'worden, has a number of plates for Amekleidea won Jformkopfea or heat hoods miteiBaiaäer SRA vereinigest iadera m @ M is a metal "etch incorporated or you iaöam gwoi or more plates on eisssfiewebe or eiaer cardboard © oatiert hato Siese Lösi of Iteobleiis are however ragwerlässig wa & teuxe ^ o It is «a hole found a v / örden ₉ äaB dTareh fiie Yerx-jentong -won flatten made of materials rom geaUgeadle ^ G-iosflexigkeit WarmiaiibeB © der © ießfeanben on the sheet © ® that could turn rmnd nm ei®® Isk® ä®B upper part iss ¹ Bloofc form erstreekea «S® is according to d®s> Irfiadiaag siaa Mrasehaiafe vosg @@@ k @ a ₉ di @ at least gw @ i Platte® made of Meg

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saraem fireproof heat insulating material covered by each having a flexibility (as defined below) not exceeding 20 kg, with the ends at least one such plate lie in planes that are parallel or at an included angle cut from a maximum of 120 °. In this way, each plate can be essentially one-half of a full one Represent pouring hood, wherein the heating hood or pouring hood consists of two plates, which are located along two adjacent j

ter walls of a mold or a casting hood of rectangular opening (included angle about 90 °) ER- ¹ stretch or extend by about half a circular shape or a circular casting hood (parallel planes). Optionally, four plates may be provided, each of which extends between the centers of the adjacent walls of a block mold or a spout of rectangular opening or around a quadrant of a mold or spout having a circular opening. The term "complete warming cap" or "full Gießhaube" is used herein to denote a substantially complete ring of refractory heat-insulating material which is suitable to line the m head of an ingot mold or a casting hood for such a block form.

Although the heat hood can be formed from two flexible lining panels, which only in the desired Shape are bent, are preferably the. both plates with grooves or relief areas

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forms where the panel is to be folded. So can for Lining τοη rectangular shapes plates with folding grooves are provided, which determine the position of a corner, when the panel is folded. The length of the plate on each side of the palte corresponds to the long and short sides of the right-angled head of the shape.

In the pail of circular shaped heads, the plate are regularly relieved by a series of equally spaced grooves. There is therefore an advantage this heat hood arrangements in that the plates can be made, stored and transported flat, while nonetheless easily erected for use or can be bent.

The term "flexibility" as used above relates to an experiment as described in German patent application P 20 152 66.3, to which reference is made here. In short, the flexibility value is the bending load applied to a sample of the material of a given size and shape by a central knife edge, the material being supported by two knife edges arranged opposite one another at a distance. At the point where the middle knife edge has moved 0.7 cm against the other knife edges _9, a distance therefrom equal to the thickness of the sample is assumed. The more flexible the material, the lower the flexibility values.

The method of manufacture and the special composition of the panels are not critical as long as the above flexibility condition is met. In the said

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Patent application describes the composition and manufacture of such materials ".

If desired, the columns (if available) between the two plates of flexible refractory heat insulating material are closed by thin wedges of refractory material that are in place after Inserting the two plates into the mold are driven with the hammer. The panels can take their place in the form by any conventional, e.g. B. by nailing, attaching straps or clips (clips) or held by gluing with a suitable adhesive. If the panels are sufficiently flexible, you can keep yourself in shape.

With a special application of the heating hoods according to of the invention is the localization and holding the plates easily and automatically obtained. This is so in the case of using a slotted block shape as disclosed in British Patent Specification 936,682 and in US Pat British patent application 42 226/68. In such a pail will be the inside of the slots in the form covered with a thin sheet of metal, e.g. B. soft steel sheet. When using the warming hoods according to Invention, the lower edge of this sheet is turned inwards towards the center of the block shape and serves to lower end of the mold liner plate at the correct Place to hold. The panels can be completely attached to their Place by driving in thin wedges at two opposite corners.

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2U32368

The invention is hereinafter referred to as a particular one Example explained in more detail in connection with the drawing.

Fig. 1 shows diagrammatically (partially broken away) part of a block mold lined with a heating hood according to the invention.

Fig. 2 is a perspective view of one of the plates, which form the heating hood shown in FIG.

According to the drawing, a heating hood assembly 1 is provided in a block form 2. The arrangement 1 consists of two identical panels 3, each of which is provided with a pair of folding grooves 4 which define the corner of the determine folded plate, »

example

Heat hood lining panels and wedges were through Dewatering an aqueous sludge prepared on a sieve mold, the sludge being a mixture of the following ingredients contained in the following proportions;

Weight -j>

Newsprint made into pulp 6

Amosity asbestos fibers 6

Slag wool (calcium silicate) 6

Aluminum silicate fibers 12 diatomite (all <0.076 mm mesh)

(-200 mesh) 10

colloidal silicon dioxide

(Syton 2X from Monsanto Company), 60

109814/1388

2U32368

The molds used were designed to provide panels suitable for a block shape for blocks of about 3136 cm ² (22 inch square); the thickness of the liner panel was about 12.5 mm (0.5 inches); and the entire warming hood (2 panels) weighed approximately 2.3 kg (5 lbs). The flexibility of the warming hood material was 8.4 kg. The warming hoods were easily put together in the mold by a man, the mean set-up time being on the order of 30 seconds per mold.

Steel blocks were then poured into the molds so lined. The pouring took place without incident, and the warming hood performance was satisfactory. The shoulder mark was very faint from the heat and the ferrostatic pressure have a tendency to compress the lower parts of the heating hood somewhat.

In comparison, it has been observed that a common set of warming hoods (4 plates, 4 wedges) for such a Form in a commercial thermal hood insulation material weighed 12.7 kg (28 lbs) and required the use of a jig to insert, which operation took a man 2 to 4 minutes per shape on average.

Similar heat hoods have been made by adding 18,000 aluminum silicate fibers and none (correspondingly) Slag wool used. This produced a more fireproof heat hood which was also satisfactory Results.

109814/1388

Claims (3)

Claims 1. Warming hood arrangement with at least awei plates made of flexible refractory heat insulating material that each having a flexibility not exceeding 20 kg, characterized in that the ends of at least one such plate lie in planes that are parallel or with an included angle of at most 1.20 ° cut. 2. Warming hood arrangement aaeh claim 1, characterized in that that each plate represents essentially one-half of the total heating hood. 3. WärmehaubeQas @ rdQuag according to Aasaghi 1 or 2 $ characterized ₉ that each plate is provided with a bucket of aeteeren grooves for the determination of one or aeteerer Faltliaio® plate » 1098U / 138 8-