US3736979A - Die for tube profiles - Google Patents

Die for tube profiles Download PDF

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Publication number
US3736979A
US3736979A US00108758A US3736979DA US3736979A US 3736979 A US3736979 A US 3736979A US 00108758 A US00108758 A US 00108758A US 3736979D A US3736979D A US 3736979DA US 3736979 A US3736979 A US 3736979A
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Prior art keywords
mandrel
bore
threaded
cylindrical
liner
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US00108758A
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H Krall
H Koch
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Technica Guss GmbH
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Technica Guss GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/006—Continuous casting of metals, i.e. casting in indefinite lengths of tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting

Definitions

  • ABSTRACT A die arrangement for continuous casting tube profiles having an outer cylindrical-like die portion and a mandrel spaced in the bore of the outer die portion, the mandrel is held radially in the bore by a cylindrical collar thereon at one end fitting into a surrounding cylindrical recess in-the outer die portion and is held in an axial direction by a threaded portion on the same end of the mandrel threadedly received in a surrounding threaded portion of the outer die portion. There are axially extending passageways through the collar and threaded portions of the mandrel for flow of casting material to form the tube in the space between the mandrel and the surrounding outer die portion.
  • a die consisting of a cylindrical outer die portion and of a mandrel attached in the middle thereof.
  • This mandrel can be mounted in the die portion by means of a press fit.
  • a press fit There is, however, a possiblity that the mandrel might move back into the furnace during production, because the press fit may not suffice for holding the mandrel, due to the high thermal stress during operation.
  • the invention is meant to avoid these disadvantages.
  • the problem is solved by holding the mandrel by means of a cylindrical collar in a cylindrical recess of the outer liner or outer die portion in radial direction, and by means of threads in axial direction.
  • a central position of the mandrel is achieved and it cannot be pushed out of the die.
  • FIG. 1 an end view of the arrangement as viewed from the furnace
  • FIG. 2 a longitudinal section of the arrangement in FIG. 1 as viewed along section line 2-2,
  • FIG. 3 is an end view of a separate annular element that may replace the centering cylindrical collar portion on the mandrel and
  • FIG. 4 is a fragmentary drawing showing a modified mandrel with the separate annular element of FIG. 3 installed in the outer cylindrical liner or die portion, the section of the mandrel is taken through a solid portion.
  • DETAILED DESCRIPTION There is an outer cylindrical liner or die portion 1 formed at the entrance end with a cylindrical recess 5 slightly larger than the bore of the die portion thereby leaving a shoulder at 5a and out from the recess 5 a further enlarged threaded recess 5b.
  • a mandrel 2 is received in the outer die portion 1 and a short cylindrical collar 4 having a corresponding diameter to that of recess 5 is received therein and holds the mandrel centered in a radial direction.
  • the shoulder 5a prevents the mandrel from inclining its axis relative to the axis of the outer die portion 1 caused by its dead weight.
  • a threaded portion 3 on an enlarged entrance end of the mandrel is threadedly received in the threads 5b of the outer die portion entrance end to hold the mandrel from being pushed axially out of the surrounding die portion 1 and to press it against the shoulder 5a.
  • Axially extending apertures 6 are machined in the collar 4 at its entrance end to provide passageways from the holding furnace for molten metal to enter the bore of the outer die portion 1 and about the mandrel 2 to form a tube.
  • the outer die portion 1 and the mandrel 2 may be fabricated from graphite.
  • the cylindrical collar 4 while shown in FIGS. 1 and 2 as integral with the mandrel could be a separate annular element 40 such as shown in FIG. 3 and in FIG. 4 installed on a modified mandrel 2a.
  • the annual element 4a centers the mandrel in a radial direction within the cylindrical liner or die portion 1.
  • a die arrangement for tube profiles comprising an outer die portion or liner having a bore therethrough, a threaded recessed entrance end larger than said bore and a cylindrical recess adjacent the threaded recessed end having a diameter intermediate that of the bore and the threaded recessed end thereby forming a radially extending shoulder portion at the bore end of the cylindrical recess; a mandrel received in spaced relation within the bore of the liner or outer die portion and having an enlarged threaded end received within the threaded entrance end of the outer liner, a cylindrical collar portion of corresponding diameter to that of the cylindrical recess in the outer liner and received therein and axially extending apertures in the enlarged threaded end collar providing passageways for molten metal to enter to the bore of the outer die portion and about the mandrel, whereby the mandrel is held concentrically within the liner or outer die portion and in a radial direction by the cylindrical collar and the cylindrical recess and held in an axial position by said threade
  • a die arrangement according to claim 1 fabricated from graphite.
  • a die arrangement according to claim 3 fabricated from graphite.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Continuous Casting (AREA)

Abstract

A die arrangement for continuous casting tube profiles having an outer cylindrical-like die portion and a mandrel spaced in the bore of the outer die portion, the mandrel is held radially in the bore by a cylindrical collar thereon at one end fitting into a surrounding cylindrical recess in the outer die portion and is held in an axial direction by a threaded portion on the same end of the mandrel threadedly received in a surrounding threaded portion of the outer die portion. There are axially extending passageways through the collar and threaded portions of the mandrel for flow of casting material to form the tube in the space between the mandrel and the surrounding outer die portion.

Description

llnited States Patent 1 Krall et al.
[ ,iiine 5,1973
[54] DIE FOR TUBE PROFILES [73] Assignee: Technica-Guss GmbH, Wurzburg,
Germany 22 Filed: Jan.22, 1971 211 Appl.No.: 108,758
[30] Foreign Application Priority Data Jan. 30, 1970 Germany ..P 20 04 193.4
[52] US. Cl. ..164/281, 164/85, 425/380 [51] Int. Cl. ..B22d 11/10 [58] Field of Search ..164/85, 281; 425/380; 72/266, 267, 268
[56] References Cited UNITED STATES PATENTS 3,375,863 4/1968 Atkin et al ..164/85 X 2,466,612 4/1949 Phillips et a1. ....l64/85 X 670,611 3/1901 Hoffman ..425/380 2,924,332 Lawton et al ..72/268 X 2,981,409 4/1961 Colleoni ..72/268 2,243,031 5/1941 Fogg t 72/268 3,302,440 2/1967 Seidel et al. ..72/268 X 3,578,065 5/1971 Langer ..164/85 X Primary Examiner-J. Spencer Overholser Assistant Examiner.lohn E. Roethel Attorney-Jones & Lockwood [57] ABSTRACT A die arrangement for continuous casting tube profiles having an outer cylindrical-like die portion and a mandrel spaced in the bore of the outer die portion, the mandrel is held radially in the bore by a cylindrical collar thereon at one end fitting into a surrounding cylindrical recess in-the outer die portion and is held in an axial direction by a threaded portion on the same end of the mandrel threadedly received in a surrounding threaded portion of the outer die portion. There are axially extending passageways through the collar and threaded portions of the mandrel for flow of casting material to form the tube in the space between the mandrel and the surrounding outer die portion.
4 Claims, 4 Drawing Figures Patented June 5, 1973 3,736,79
3 Sheets-Sheet 2 Patented June 5, 1973 3 Sheets-Sheet 3 DIE FOR TUBE PROFILES BACKGROUND OF THE INVENTION The invention concerns a die for tube profiles.
For the production of tubes by the continuous casting method it is common to use a die consisting of a cylindrical outer die portion and of a mandrel attached in the middle thereof. This mandrel can be mounted in the die portion by means of a press fit. There is, however, a possiblity that the mandrel might move back into the furnace during production, because the press fit may not suffice for holding the mandrel, due to the high thermal stress during operation. There is another way to attach the mandrel to the outer die portion by means of threads. In this case the mandrel is held in its position there within, but it is very difficult to manufacture these threads in such a way that the mandrel is positioned centrally within the outer die portion in all cases.
The invention is meant to avoid these disadvantages.
The problem is solved by holding the mandrel by means of a cylindrical collar in a cylindrical recess of the outer liner or outer die portion in radial direction, and by means of threads in axial direction. Thus, a central position of the mandrel is achieved and it cannot be pushed out of the die.
BRIEF DESCRIPTION OF THE DRAWINGS An example of the invention is shown in the drawing, and will be described in detail in the following paragraph.
FIG. 1 an end view of the arrangement as viewed from the furnace,
FIG. 2 a longitudinal section of the arrangement in FIG. 1 as viewed along section line 2-2,
FIG. 3 is an end view of a separate annular element that may replace the centering cylindrical collar portion on the mandrel and FIG. 4 is a fragmentary drawing showing a modified mandrel with the separate annular element of FIG. 3 installed in the outer cylindrical liner or die portion, the section of the mandrel is taken through a solid portion.
DETAILED DESCRIPTION There is an outer cylindrical liner or die portion 1 formed at the entrance end with a cylindrical recess 5 slightly larger than the bore of the die portion thereby leaving a shoulder at 5a and out from the recess 5 a further enlarged threaded recess 5b. A mandrel 2 is received in the outer die portion 1 and a short cylindrical collar 4 having a corresponding diameter to that of recess 5 is received therein and holds the mandrel centered in a radial direction. The shoulder 5a prevents the mandrel from inclining its axis relative to the axis of the outer die portion 1 caused by its dead weight. A threaded portion 3 on an enlarged entrance end of the mandrel is threadedly received in the threads 5b of the outer die portion entrance end to hold the mandrel from being pushed axially out of the surrounding die portion 1 and to press it against the shoulder 5a. Axially extending apertures 6 are machined in the collar 4 at its entrance end to provide passageways from the holding furnace for molten metal to enter the bore of the outer die portion 1 and about the mandrel 2 to form a tube. The outer die portion 1 and the mandrel 2 may be fabricated from graphite.
The cylindrical collar 4 while shown in FIGS. 1 and 2 as integral with the mandrel could be a separate annular element 40 such as shown in FIG. 3 and in FIG. 4 installed on a modified mandrel 2a. The annual element 4a centers the mandrel in a radial direction within the cylindrical liner or die portion 1.
What is claimed is:
1. A die arrangement for tube profiles comprising an outer die portion or liner having a bore therethrough, a threaded recessed entrance end larger than said bore and a cylindrical recess adjacent the threaded recessed end having a diameter intermediate that of the bore and the threaded recessed end thereby forming a radially extending shoulder portion at the bore end of the cylindrical recess; a mandrel received in spaced relation within the bore of the liner or outer die portion and having an enlarged threaded end received within the threaded entrance end of the outer liner, a cylindrical collar portion of corresponding diameter to that of the cylindrical recess in the outer liner and received therein and axially extending apertures in the enlarged threaded end collar providing passageways for molten metal to enter to the bore of the outer die portion and about the mandrel, whereby the mandrel is held concentrically within the liner or outer die portion and in a radial direction by the cylindrical collar and the cylindrical recess and held in an axial position by said threaded portions.
2. A die arrangement according to claim 1 fabricated from graphite.
3. A die arrangement for tube profiles according to claim 1 wherein said cylindrical collar is a separate annular member received over an adjacent cylindrical portion on the mandrel to hold the mandrel radially within the outer liner.
4. A die arrangement according to claim 3 fabricated from graphite.

Claims (4)

1. A die arrangement for tube profiles comprising an outer die portion or liner having a bore therethrough, a threaded recessed entrance end larger than said bore and a cylindrical recess adjacent the threaded recessed end having a diameter intermediate that of the bore and the threaded recessed end thereby forming a radially extending shoulder portion at the bore end of the cylindrical recess; a mandrel received in spaced relation within the bore of the liner or outer die portion and having an enlarged threaded end received within the threaded entrance end of the outer liner, a cylindrical collar portion of corresponding diameter to that of the cylindrical recess in the outer liner and received therein and axially extending apertures in the enlarged threaded end collar providing passageways for molten metal to enter to the bore of the outer die portion and about the mandrel, whereby the mandrel is held concentrically within the liner or outer die portion and in a radial direction by the cylindrical collar and the cylindrical recess and held in an axial position by said threaded portions.
2. A die arrangement according to claim 1 fabricated from graphite.
3. A die arrangement for tube profiles according to claim 1 wherein said cylindrical collar is a separate annular member received over an adjacent cylindrical portion on the mandrel to hold the mandrel radially within the outer liner.
4. A die arrangement according to claim 3 fabricated from graphite.
US00108758A 1970-01-30 1971-01-22 Die for tube profiles Expired - Lifetime US3736979A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702004193 DE2004193A1 (en) 1970-01-30 1970-01-30 Continuous casting mold for pipe profiles

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295516A (en) * 1978-11-08 1981-10-20 Timex Corporation Symmetrical horizontal continuous casting
US5056703A (en) * 1988-01-28 1991-10-15 Fuji Photo Film Co., Ltd. Method of splicing webs
US10183420B2 (en) 2016-02-15 2019-01-22 General Electric Company Resistively heated thermoplastic washout mandrel

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US670611A (en) * 1900-12-27 1901-03-26 Fried Krupp Grusonwerk Mouthpiece for presses for the manufacture of pipes and protecting-covers made of plastic materials.
US2243031A (en) * 1939-05-11 1941-05-20 Kennecott Wire And Cable Compa Method and apparatus for applying metallic sheaths to cables
US2466612A (en) * 1946-07-02 1949-04-05 American Smelting Refining Continuously casting hollow metal shapes
US2924332A (en) * 1952-09-23 1960-02-09 British Insulated Callenders Extrusion press for cable sheathing
US2981409A (en) * 1957-04-13 1961-04-25 Pirelli Sealing device for lead press
US3302440A (en) * 1963-03-20 1967-02-07 Schloemann Ag Extrusion presses, particularly cable-sheathing presses
US3375863A (en) * 1966-03-16 1968-04-02 Anaconda American Brass Co Apparatus for continuous casting metal tubes
US3578065A (en) * 1968-08-31 1971-05-11 Kabel Metallwerke Ghh Mandrel holder for horizontal pipe casting apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US670611A (en) * 1900-12-27 1901-03-26 Fried Krupp Grusonwerk Mouthpiece for presses for the manufacture of pipes and protecting-covers made of plastic materials.
US2243031A (en) * 1939-05-11 1941-05-20 Kennecott Wire And Cable Compa Method and apparatus for applying metallic sheaths to cables
US2466612A (en) * 1946-07-02 1949-04-05 American Smelting Refining Continuously casting hollow metal shapes
US2924332A (en) * 1952-09-23 1960-02-09 British Insulated Callenders Extrusion press for cable sheathing
US2981409A (en) * 1957-04-13 1961-04-25 Pirelli Sealing device for lead press
US3302440A (en) * 1963-03-20 1967-02-07 Schloemann Ag Extrusion presses, particularly cable-sheathing presses
US3375863A (en) * 1966-03-16 1968-04-02 Anaconda American Brass Co Apparatus for continuous casting metal tubes
US3578065A (en) * 1968-08-31 1971-05-11 Kabel Metallwerke Ghh Mandrel holder for horizontal pipe casting apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295516A (en) * 1978-11-08 1981-10-20 Timex Corporation Symmetrical horizontal continuous casting
US5056703A (en) * 1988-01-28 1991-10-15 Fuji Photo Film Co., Ltd. Method of splicing webs
US10183420B2 (en) 2016-02-15 2019-01-22 General Electric Company Resistively heated thermoplastic washout mandrel

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Publication number Publication date
CH514377A (en) 1971-10-31
FR2077405B3 (en) 1973-08-10
FR2077405A7 (en) 1971-10-22
DE2004193A1 (en) 1971-08-12

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