US3186042A - Hot top gasket - Google Patents

Hot top gasket Download PDF

Info

Publication number
US3186042A
US3186042A US24710962A US3186042A US 3186042 A US3186042 A US 3186042A US 24710962 A US24710962 A US 24710962A US 3186042 A US3186042 A US 3186042A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
mold
hot top
gasket
ring
top
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
Inventor
Robert E Daley
Original Assignee
Robert E Daley
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
Grant date

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/02Sealings between relatively-stationary surfaces
    • F16J15/06Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/12Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
    • F16J15/121Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00Casting ingots, e.g. from ferrous metals
    • B22D7/06Ingot moulds or their manufacture
    • B22D7/10Hot tops therefor

Description

June 1, 1965 R. E. DALEY 3,186,Q42

HOT TOP GASKET Filed Dec. 26, 1962 INVENTOR. AaaERr E. DIALEY BY ATTORNEYS.

United States Patent 3,186,042 HOT TOP GASKET Robert E. Daley, 8355 Remington Drive, Pittsburgh, Pa. Filed Dec. 26, 1962, Ser. No. 247,109 1 Claim. (Cl. 277-11) This invention relates to the casting of metal into ingots, and more particularly to the sealing of the joint between the top of an ingot mold and a superimposed hot top.

It is desirable to use a superimposed hot top in making ingots, because a hot top resting on top of an ingot mold avoids forming a shoulder on the ingot in the upper part of the mold. Nevertheless, there has been an objection to the use of superimposed hot tops, due to the difiiculty in sealing the joint between the top of the mold and the bottom of such a hot top. Any leakage of metal at this point forms a projecting fin which adds to the cost of the ingot, because either the ingot must be treated further to eliminate the tfin, or in rolling the ingot the fin will be pressed down against the body of the ingot and require further conditioning of the product. Machined surfaces have been tried in order to provide an adequate seal, but they have not been very successful because of warpage of the comparatively light ledge at the bottom of the hot top casting. Asbestos rope and spun glass have been placed between the hot top and mold to form a seal, but the results have not been very good because of the difiiculty of handling and accurately positioning that material.

It is among the objects of this invention to provide between the bottom of a hot top and the top of an ingot mold a seal which is dependable, which is easy to handle, which is preformed to the desired shape, and which will always be correctly positioned.

In accordance with this invention a seal is formed between an ingot mold and a superimposed hot top by means of a gasket that includes a plastic ring which engages both hot top and mold. Completely or partly embedded in the plastic ring is a stiffening core, which holds the ring in substantially the same shape as the inside contour of the mold. The gasket is thus preformed to fit the mold. For best results, a portion of the gasket core projects down into the mold close to its inner surface to assure correct positioning of the gasket on the mold before the hot top is applied. The weight of the hot top compresses the plastic ring against the mold to form a good seal between them.

The invention is illustrated in the accompanying drawings, in which FIG. 1 is a fragmentary vertical section through the upper end of the mold supporting my gasket and hot top;

FIG. 2 is an enlarged plan view of the gasket alone;

FIG. 3 is a cross section of the gasket before the hot top has been set on top of it;

FIG. 4 is a view similar to the preceding figure, but with the hot top in place; and

FIG. 5 is a view, similar to FIG. 3, of a modified embodiment of the invention.

Referring to FIGS. 1 to 4 of'the invention, the hot top casing 1 may have any desired shape in horizontal section, but its central passage should conform to the shape of the inside of the ingot mold 2 that supports the hot top. The bottom of the casing is provided with'the usual integral inwardly projecting ledge 3. The inner surface of the casing preferably converges downwardly from the top of the casing to the bottom ledge, and the outside of the refractory lining 4 is tapered downwardly to the same degree. The inner surface of the lining converges up- 3,186,042 Patented June 1, 1965 wardly in the customary manner. The lining may be separated from the metal casing by a layer of separating material 5 that will burn out or deteriorate from the high temperatures encountered in use. To prevent the refractory lining from accidentally escaping from the casing before the hot top is used, the lining may be locked inside of the casing by suitable means, such as by an overlapping ring 6 removably connected to the top of the casing by threaded studs 7 or the like.

It is a feature of this invention that the hot top is spaced from the top of the mold by a sealing gasket of special form which seals the joint between the two. The sealing member itself is a plastic ring 10 that initially is preferably round in cross section as shown in FIG. 3, and that is made of a compressible plastic material which can Withstand the heat of molten metal. It preferably is made of clay mixed with oil, to which fillers such as asbestos, sand, vermiculite or graphite can be added. The plastic ring is preformed to the desired shape by a stiff core, usually of metal. The core shown is a plate-like ring 11 provided with perforations 12. It may be sheet metal with holes punched in it or it may be a wire screen. It is even possible to use heavy hard paper that has been treated to make it fire retardant. The core ring is partly embedded in the plastic ring by molding the plastic material against it with some of the material extending through some of the holes in the core so that the two rings are interlocked and can be handled as a single, more or less rigid, unit. 7

The core ring also holds the plastic ring in the shape of the core, which has been preformed to provide it with the same contour as the inside of the mold so that the plastic ring will rest on top of the mold a substantially uniform distance from the inner edge of the mold throughout the circumference of the ring. To make it easier to correctly position or center the gasket on the mold, it is preferred that a portion of the core project inwardly from the plastic ring and then extend downwardly a short distance into the mold close to its inner surface. This downwardly extending positioning portion may be a continuous lip or a series of circumferentially spaced legs or lugs 13.

After the gasket has been set on the mold as shown in FIG. 3, the hot top is lowered onto the gasket. The weight of the hot top will compress the plastic ring as shown in FIG. 4, so that it will form a good seal between the mold and hot top. Of course, when metal is poured into the mold it will consume the exposed portions of the core ring of the gasket, but that will not affect the plastic seal.

In the modification shown in FIG. 5, a plastic sealing ring 15 completely surrounds and conceals a stiff central core that is in the form of a heavy stiff wire 16. The wire is first formed with the same contour as the inside of the mold 17 with which the gasket is to be used, and then the plastic material is molded around the wire. To aid in positioning this gasket on the mold, a series of short wires 18 are spaced circumferentially around the gasket and each one is looped around the plastic ring. One end of each wire may be bent sharply to form a radial projection extending into the plastic ring to prevent the wire from rotating around the rings. The other end of the wire leaves the plastic ring and extends down into the mold close to its inner surface. This gasket is compressed in the same manner as the one first described herein when a hot top is placed on it.

According to the provisions of the patent statutes, I have explained the principle of my invention and have illustrated and described what I now consider to represent its best embodiment. However, I desire to have it understood that, within the scope of the appended claim, the invention may be practiced otherwise than as specifically illustrated and described.

I claim:

A hot top gasket adapted to support a hot top on an ingot mold, the gasket comprising a horizontal compressible plastic refractory ring that is substantially circular in vertical cross section, a central stiffening core completely embedded in the ring to hold it in a predetermined shape, and a plurality of circumferentially spaced wires wrapped around the ring, one end of each wire projecting from the ring downwardly adjacent the inner periphery of the ring substantially parallel to its axis, and the other end of each wire extending substantially radially into the plastic refractory to hold the wire against rotation 15 around the ring.

References Cited by the Examiner UNITED STATES PATENTS King 277-235 Lindemuth 22-147 Messler 22-147 Kinzel 277-11 Charman 22-147 Weisenburg 277-235 Nardin 277-11 Stinger 277-235 Kaufirnan 22-147 Wurtz et al 277-235 Yerrick 22-147 MARCUS U. LYONS, Primary Examiner.

US3186042A 1962-12-26 1962-12-26 Hot top gasket Expired - Lifetime US3186042A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3186042A US3186042A (en) 1962-12-26 1962-12-26 Hot top gasket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3186042A US3186042A (en) 1962-12-26 1962-12-26 Hot top gasket

Publications (1)

Publication Number Publication Date
US3186042A true US3186042A (en) 1965-06-01

Family

ID=22933590

Family Applications (1)

Application Number Title Priority Date Filing Date
US3186042A Expired - Lifetime US3186042A (en) 1962-12-26 1962-12-26 Hot top gasket

Country Status (1)

Country Link
US (1) US3186042A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3405807A (en) * 1967-06-08 1968-10-15 Union Tank Car Co Filter cartridge sealing means
US3499655A (en) * 1966-12-30 1970-03-10 Victor Mfg & Gasket Co Elastomeric grommet for gaskets
US3871034A (en) * 1973-01-15 1975-03-18 Jay R Smith Mfg Co Face plate gasket
US4630833A (en) * 1983-01-19 1986-12-23 Otis Engineering Corporation Molded ring seal with end support rings
US4871181A (en) * 1987-04-09 1989-10-03 Metex Corporation Reinforced squeak free seal for exhaust couplings
US5044641A (en) * 1989-10-31 1991-09-03 Dana Corporation Frictionless positioning grommet for engine gasket
US6533977B1 (en) 1997-12-10 2003-03-18 Acs Industries, Inc. High temperature composite structure and method of manufacturing same
US6665995B2 (en) * 1999-01-14 2003-12-23 Afg Industries, Inc. Rubber core spacer with central cord
US20080303220A1 (en) * 2007-06-06 2008-12-11 Gerardo Darce Plastic pipe sealing gasket and process for belling plastic pipe
US20090041537A1 (en) * 2005-04-26 2009-02-12 Societe De Prospection Et D'inventions Techniques Spit Sealing Connector and Assembly Consisting of a Transmission Member, a Gas Cartridge and an Adapter Comprising the Connector

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1052726A (en) * 1911-08-14 1913-02-11 Us Metallic Packing Co Metallic rod-packing.
US1332905A (en) * 1919-06-09 1920-03-09 Lewis B Lindemuth Hot-top
US1668567A (en) * 1926-12-08 1928-05-08 Eugene L Messler Hot top for ingot molds
US1943122A (en) * 1931-11-03 1934-01-09 Arch H Kinzel Gasket
US2030199A (en) * 1932-05-23 1936-02-11 Walter M Charman Mold extension for ingot molds
US2054210A (en) * 1933-05-22 1936-09-15 Crown Cork & Seal Co Clutch plate
US2462762A (en) * 1944-10-19 1949-02-22 Us Gasket Company Gasket centering means
US2796457A (en) * 1952-06-23 1957-06-18 Walter E Stinger R-f gasket for radio interference attenuation
US2863192A (en) * 1954-12-30 1958-12-09 Valley Mould & Iron Corp Hot top and mould assembly
US2893058A (en) * 1955-06-24 1959-07-07 Federal Mogul Bower Bearings Seal ring
US3097405A (en) * 1963-07-16 Extruded ribbon of fire clay

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3097405A (en) * 1963-07-16 Extruded ribbon of fire clay
US1052726A (en) * 1911-08-14 1913-02-11 Us Metallic Packing Co Metallic rod-packing.
US1332905A (en) * 1919-06-09 1920-03-09 Lewis B Lindemuth Hot-top
US1668567A (en) * 1926-12-08 1928-05-08 Eugene L Messler Hot top for ingot molds
US1943122A (en) * 1931-11-03 1934-01-09 Arch H Kinzel Gasket
US2030199A (en) * 1932-05-23 1936-02-11 Walter M Charman Mold extension for ingot molds
US2054210A (en) * 1933-05-22 1936-09-15 Crown Cork & Seal Co Clutch plate
US2462762A (en) * 1944-10-19 1949-02-22 Us Gasket Company Gasket centering means
US2796457A (en) * 1952-06-23 1957-06-18 Walter E Stinger R-f gasket for radio interference attenuation
US2863192A (en) * 1954-12-30 1958-12-09 Valley Mould & Iron Corp Hot top and mould assembly
US2893058A (en) * 1955-06-24 1959-07-07 Federal Mogul Bower Bearings Seal ring

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499655A (en) * 1966-12-30 1970-03-10 Victor Mfg & Gasket Co Elastomeric grommet for gaskets
US3405807A (en) * 1967-06-08 1968-10-15 Union Tank Car Co Filter cartridge sealing means
US3871034A (en) * 1973-01-15 1975-03-18 Jay R Smith Mfg Co Face plate gasket
US4630833A (en) * 1983-01-19 1986-12-23 Otis Engineering Corporation Molded ring seal with end support rings
US4871181A (en) * 1987-04-09 1989-10-03 Metex Corporation Reinforced squeak free seal for exhaust couplings
US5044641A (en) * 1989-10-31 1991-09-03 Dana Corporation Frictionless positioning grommet for engine gasket
DE19856883B4 (en) * 1997-12-10 2009-06-04 Acs Industries, Inc. High-temperature resistant composite structure and methods for preparing
US6533977B1 (en) 1997-12-10 2003-03-18 Acs Industries, Inc. High temperature composite structure and method of manufacturing same
US6665995B2 (en) * 1999-01-14 2003-12-23 Afg Industries, Inc. Rubber core spacer with central cord
US20090041537A1 (en) * 2005-04-26 2009-02-12 Societe De Prospection Et D'inventions Techniques Spit Sealing Connector and Assembly Consisting of a Transmission Member, a Gas Cartridge and an Adapter Comprising the Connector
US7891712B2 (en) * 2005-04-26 2011-02-22 Societe De Prospection Et D'inventions Techniques Spit Sealing connector and assembly
US20080303220A1 (en) * 2007-06-06 2008-12-11 Gerardo Darce Plastic pipe sealing gasket and process for belling plastic pipe
US8074996B2 (en) * 2007-06-06 2011-12-13 S & B Technical Products, Inc. Plastic pipe sealing gasket and process for belling plastic pipe

Similar Documents

Publication Publication Date Title
US3478999A (en) Refractory panel unit with hinge means and frangible portions
US5267740A (en) Metal head gasket with integrated sealing aids
US3334774A (en) Fluid seal
US4045153A (en) Molding apparatus including one-piece flexible mold and means to restrict the deformation of the mold
US4650149A (en) Mold assembly for installing a gasket in the peripheral wall of an opening in a wall
US4616691A (en) Countergravity casting apparatus
US3928963A (en) Cast in place gas turbine containment ring and method of manufacture
US3727876A (en) Core device for void forming and gasket support in a mold wall
US2828516A (en) Ladle for casting metal
US3796406A (en) Gasket seal between, sewer pipe and manhole opening
US4424956A (en) Drapable, consumable, heat retention shield for hot metal cars
US4055336A (en) Lining slabs
US4492382A (en) Refractory fiber ladle preheater sealing rings
US6673306B2 (en) Refractory lining for metallurgical vessel
US2702613A (en) Brake drum construction
US2526687A (en) Cast iron melting vessel with graphite plugs therein
US3570585A (en) Pattern for making mold with a back draft
US3227798A (en) Bell furnace for the preparation of uranium metal by magnesiothermic reduction
US4040471A (en) Method of making or repairing and securing lugs and trunnion members to ingot molds
US3982721A (en) Molding apparatus including a one-piece flexible mold deformable by fluid pressure differential
US2821000A (en) Exothermic lined feed-head frame
US3006046A (en) Hot top for ingot mold and method of making the same
US2395602A (en) Pressure cooker
US3182359A (en) Vacuum casting apparatus
US2964307A (en) Sealing means