US3385953A - Heater for extrusion press container - Google Patents

Heater for extrusion press container Download PDF

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Publication number
US3385953A
US3385953A US491118A US49111865A US3385953A US 3385953 A US3385953 A US 3385953A US 491118 A US491118 A US 491118A US 49111865 A US49111865 A US 49111865A US 3385953 A US3385953 A US 3385953A
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US
United States
Prior art keywords
heater
container
temperature
elements
housing
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
US491118A
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English (en)
Inventor
Charles V Henneberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Farrel Corp
Original Assignee
Farrel Corp
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
Application filed by Farrel Corp filed Critical Farrel Corp
Priority to US491118A priority Critical patent/US3385953A/en
Priority to GB26295/66A priority patent/GB1092018A/en
Priority to DE19661527794 priority patent/DE1527794A1/de
Application granted granted Critical
Publication of US3385953A publication Critical patent/US3385953A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
    • B21C29/02—Cooling or heating of containers for metal to be extruded
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0014—Devices wherein the heating current flows through particular resistances
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0019—Circuit arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49934—Inward deformation of aperture or hollow body wall by axially applying force

Definitions

  • thermocouple When the temperature of the container reaches a first value, one of the switches opens to halve the voltage across the elements; and when said temperature exceeds a second value above the first, the second switch opens to deenergize the elements until the temperature falls below said second value.
  • This invention relates to extrusion presses, and more particularly to electric, radiant heating of the billet containers of metal extrusion presses.
  • each heater is usually made of a plurality of short heater elements connected in series with their connection points located in a zone of high ambient temperature.
  • the points of mechanical connection become weak points in the series heater system, and the connections tend to loosen through temperature cycling.
  • An object of this invention is to provide an improved container heater, which will have a substantially longer operating life than prior billet heaters of the type described.
  • a major object of this invention is to provide an improved container heater in which extreme surges of power are substantially eliminated, thereby substantially increasing the operating life of the heater.
  • an object of the invention is to provide an electric radiant heating system for extrusion press containers in which the heaters will operate without extreme changes in wire and sheath temperatures over the greater part of any standard length operating cycle.
  • Another object of this invention is to provide an improved container heater which for the most part utilizes standard, readily available components, thereby minimizing manufacturing costs.
  • a still further object of this invention is to provide an improved container heater, which is far more efficient than prior heaters of this type.
  • Still another object of the invention is to provide a heater for the containers of extrusion presses in which the power consumption can be materially reduced as compared with conventional such heaters.
  • FIG. 1 is a vertical section through a billet container and housing equipped with a heater made in accordance with one embodiment of this invention
  • FIG. 2 is a plan view of this housing with part of the upper section of the housing cut away to illustrate portions of the heater;
  • FIG. 3 is a wiring diagram illustrating one manner in which this heater may be wired.
  • FIGS. 1 and 2 designates a container housing comprising upper and lower sections 12 and 13, which are removably secured to one another by bolts 14.
  • the housing sections 12 and 13 have integral bearing portions at both ends, which are denoted 17 and 18, respectively.
  • Removably secured between the sections 12 and 13 and seated on the bearing portions 17 and 18 is the billet container 16.
  • Keys 15, which engage in aligned slots in the container and in the bearing portions 18, serve to hold the container against rotation in the housing.
  • sections 12 and 13 accommodate arcuate-shaped heater coils 21 and 22, respectively. These coils 21 and 22 are mounted in their respective sections 12 and 13 on metal clips 23, which are secured to arcuate insulating blocks 24 that are fastened, in turn, to the respective sections by studs 20.
  • Coil 21 comprises a plurality (three in the embodiment illustrated) of electric heater elements 25, 26 and 27, each of which extends transversely of the container, and in addition to being curved coaxially with the con tainer, is Wound back and forth several times in opposite directions intermediate its ends to form a plurality of legs (six in the embodiment illustrated).
  • the upper housing section 12 has therethrough a plurality of spaced ports or openings 28, 29, 30 and 31.
  • Opposite ends -1 and 25-2 of element 25 project out of the openings 28 and 29, respectively; opposite ends 26-1 and 26-2 of element 26 project out of the openings 29 and 30, respectively; and opposite ends 27-1 and 27-2 of element 27 project out of the openings 30 and 31, respectively.
  • These ends 25-1, 25-2, 26-1, 26-2, 27-1 and 27-2 are connected through a flexible conduit and plug (not illustrated) removably to a nearby circuit box, where they are Wired in a circuit which will be described in more detail below.
  • Coil 22 in the lower section 13 also comprises three heater elements 35, 36 and 37 (FIG. 3), and in plan view constitutes substantially a mirror image of the coil 21 illustrated in FIG. 2.
  • opposite ends -1 and 35-2 (FIG. 3) of the element 35, opposite ends 36-1 and 36-2 (FIG. 3) of element 36, and opposite ends 37-1 and 37-2 (FIG. 3) of element 37 extend through four ports in the left side of the lower housing section 13, and are connected to the elements 25, 26 and 27 of coil 21 in the manner below described.
  • the heater element ends 25-1 and 35-1 are connected to one another as at 48 (FIG. 3); 35-2 and 26-1 are connected at 49; 26-2 and 36-1 are connected at 50; and 36-2 and 27-1 are connected at 51; 27-2 and 37-1 are connected at 52; and 37-2 and 25-2 are connected at 53.
  • Mounted in the circuit box are two, three pole switches 61 and 62, each of which has three normally closed contacts 63, 64 and 65; and 66, 67 and 68, respectively.
  • Terminals 51, 49, and 53 are connected to one side of the contacts 63, 64 and 65, respectively, by lines 54, 55 and 56.
  • the opposite sides of the contacts 63, 64 and 65 are connected by lines 71,
  • Lines 74, 75 and 76 which in turn are connected through a manually operable, three pole On-Off switch 7'7 to a three phase alternating current power source.
  • Terminals 48, 50 and 52 are connected by wires 57, 58 and 59 to one side of the contacts 66, 67 and 68, respectively.
  • the opposite sides of these contacts are connected by lines 78, 79 and 88, respectively, to the lines 74, 76 and 75, respectively.
  • Lines 75 and 76 are also connected to the input side of a control transformer illustrated schematically at T.
  • the output of transformer T is connected to the input of a conventional thermocouple-responsive, temperature control instrument 82 of the type known, for example, as West Model JPT-3 Temperature Controller.
  • Controller 82 is wired to a thermocouple 83 which is mounted in a heat sink 91 formed in the upper housing section 12, to be responsive to the temperature of the container 16.
  • the controller 82 has two set points, and is capable of providing two different outputs, viz., energizing two different circuits 84 and 85, respectively, as the temperature of the container exceeds first and second values, respectively.
  • the two different outputs, or circuits 84 and 85, of the controller 82 control the operation of the switches 61 and 62, as for example, by solenoids 86 and 87, respectively, which, when energized, open the contacts of switches 61 and 62.
  • the heater coils 21 and 22 maintain the temperature of the container at a predetermined level during the operation of the press. This temperature level will depend upon the material that is to be extruded by the press.
  • controller 82 is set to energize circuit 84, hence solenoid 86, when the thermocouple 83 indicates that the container temperature has reached or exceeded 1000 F.; and it is set to energize circuit 85, hence solenoid 87, when the container temperature reaches or exceeds 1200 F.
  • the heater coils 21 and 22 cycle on and off at one half voltage and quarter power to maintain the container 16 at its elevated temperature level-i.e., between 1000 F. and 1200 F.
  • the manually operated switch 77 is moved to its open position. As the temperature of the container drops to room temperature, both switches 61 and 62 return to their normally closed positions.
  • each heater element 25, 26, 27, 35, 36 and 37 within the housing is one integral element wound back and foith upon itself several times, and does not comprise several separate legs mechanically connected to one another as in prior heaters.
  • Each element 25, 26, 27, 35, 36, 37 moreover, has its ends extending out of the housing 11, and connected in circuit with one another at the exterior of the housing, so that the connections are not subjected to the variations in temperature within the housing that would tend to loosen them.
  • the heater coils 21 and 22 are mounted in the housing 11 rather than in the container, there is no need to substitute heater coils when changing containers.
  • the use of the two control switches 61 and 62 in addition to contributing to longer heater life, increases the control sensitivity and stability of the heater system, as well as substantially reducing the total power consumption needed to operate the heaters, as compared to prior devices. This reduction in total power consumption can amount to approximately 25% over a representative hour period.
  • section 12 can be easily removed from section 13 for removing a container 16 or repairing the coils 21 and 22.
  • billet heating apparatus comprising (a) a plurality of electrical heater elements mounted in said housing and operative, when energized, to heat said container, and
  • circuit means for connecting said elements to a source of electrical power including (1) a first pair of switches movable between open and closed positions, respectively,
  • a third switch manualy operable from an open to a closed position to connect said elements to said source to apply full voltage therefrom across each of said elements, when each of said first pair of switches is in one of its two positions, and to apply less than said full voltage across each of said elements, when one of said first pair of switches is in the other of its two positions, and to disconnect said elements from said power source, when each of said first pair of switches is in the other of its two positions, and
  • An extrusion press as defined in claim 1, wherein the last-named means comprises (a) a pair of solenoids which are operative, when energized, to move said first pair of switches from said one to said other positions,
  • thermocouple mounted in said housing adjacent said container
  • thermocouple means connecting said thermocouple to said solenoids, and operative to energize one of said solenoids, when said temperature exceeds said first values, and to energize the other of said solenoids, when said tempearture exceeds said second value.
  • thermocouple deenergizes said other solenoid, when said temperature falls below said second value
  • said other switch comprises a normally closed switch which recloses, when said other solenoid is deenergized, thereby reenergizing said elements at less than said full voltage thereby reheating said container before the temperature thereof falls below said first value.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Temperature (AREA)
  • Control Of Resistance Heating (AREA)
  • Extrusion Of Metal (AREA)
US491118A 1965-09-29 1965-09-29 Heater for extrusion press container Expired - Lifetime US3385953A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US491118A US3385953A (en) 1965-09-29 1965-09-29 Heater for extrusion press container
GB26295/66A GB1092018A (en) 1965-09-29 1966-06-13 Heater for extrusion press container
DE19661527794 DE1527794A1 (de) 1965-09-29 1966-09-08 Strangpresse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US491118A US3385953A (en) 1965-09-29 1965-09-29 Heater for extrusion press container

Publications (1)

Publication Number Publication Date
US3385953A true US3385953A (en) 1968-05-28

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ID=23950866

Family Applications (1)

Application Number Title Priority Date Filing Date
US491118A Expired - Lifetime US3385953A (en) 1965-09-29 1965-09-29 Heater for extrusion press container

Country Status (3)

Country Link
US (1) US3385953A (de)
DE (1) DE1527794A1 (de)
GB (1) GB1092018A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3531624A (en) * 1968-06-13 1970-09-29 Farrel Corp Heater for extrusion press container
US3688084A (en) * 1971-04-08 1972-08-29 Detroit Edison Co Electric broiler heating unit
US3911249A (en) * 1974-05-13 1975-10-07 Richard T Keating Deep fat fryer with melt control
US4886954A (en) * 1988-04-15 1989-12-12 Thermco Systems, Inc. Hot wall diffusion furnace and method for operating the furnace
US5268033A (en) * 1991-07-01 1993-12-07 Jeffrey Stewart Table top parylene deposition chamber
US5434387A (en) * 1990-08-09 1995-07-18 British Telecommunications Public Limited Company Apparatus and a method for heating heat-recoverable articles with heater control to produce uniform and non-uniform temperature profile
US5488833A (en) * 1994-09-26 1996-02-06 Stewart; Jeffrey Tangential flow cold trap
US6570140B2 (en) * 1999-06-23 2003-05-27 Telefonaktiebolaget Lm Ericsson (Publ) Device for heating shrinkable sleeves
US6737224B2 (en) 2001-04-17 2004-05-18 Jeffrey Stewart Method of preparing thin supported films by vacuum deposition
US20080022745A1 (en) * 2004-05-21 2008-01-31 Paul Robbins Thermal Control Extrusion Press Container

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1506443A (en) * 1922-02-25 1924-08-26 Gen Electric Temperature regulator
US1988845A (en) * 1930-01-31 1935-01-22 Nat Aniline & Chem Co Inc Electrical heating
US2832879A (en) * 1954-07-29 1958-04-29 Jurian W Van Riper Temperature control mechanism for extrusion apparatus
GB826008A (en) * 1955-08-19 1959-12-23 British Insulated Callenders Improvements in or relating to rubber processing machinery
US3119149A (en) * 1961-04-06 1964-01-28 Crompton & Knowles Corp Heat-exchange jacket attachment to extrusion cylinder
US3145842A (en) * 1962-05-17 1964-08-25 Nat Res Corp Process for the extrusion of fine wire
US3161756A (en) * 1961-02-09 1964-12-15 Schloemann Ag Electrically heated billet-containers for metal-extrusion presses
US3203216A (en) * 1960-09-20 1965-08-31 Muller Ernst Machine for incasing cables and the like
US3317958A (en) * 1964-08-17 1967-05-09 Nrm Corp Extruder

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1506443A (en) * 1922-02-25 1924-08-26 Gen Electric Temperature regulator
US1988845A (en) * 1930-01-31 1935-01-22 Nat Aniline & Chem Co Inc Electrical heating
US2832879A (en) * 1954-07-29 1958-04-29 Jurian W Van Riper Temperature control mechanism for extrusion apparatus
GB826008A (en) * 1955-08-19 1959-12-23 British Insulated Callenders Improvements in or relating to rubber processing machinery
US3203216A (en) * 1960-09-20 1965-08-31 Muller Ernst Machine for incasing cables and the like
US3161756A (en) * 1961-02-09 1964-12-15 Schloemann Ag Electrically heated billet-containers for metal-extrusion presses
US3119149A (en) * 1961-04-06 1964-01-28 Crompton & Knowles Corp Heat-exchange jacket attachment to extrusion cylinder
US3145842A (en) * 1962-05-17 1964-08-25 Nat Res Corp Process for the extrusion of fine wire
US3317958A (en) * 1964-08-17 1967-05-09 Nrm Corp Extruder

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3531624A (en) * 1968-06-13 1970-09-29 Farrel Corp Heater for extrusion press container
US3688084A (en) * 1971-04-08 1972-08-29 Detroit Edison Co Electric broiler heating unit
US3911249A (en) * 1974-05-13 1975-10-07 Richard T Keating Deep fat fryer with melt control
US4886954A (en) * 1988-04-15 1989-12-12 Thermco Systems, Inc. Hot wall diffusion furnace and method for operating the furnace
US5434387A (en) * 1990-08-09 1995-07-18 British Telecommunications Public Limited Company Apparatus and a method for heating heat-recoverable articles with heater control to produce uniform and non-uniform temperature profile
US5268033A (en) * 1991-07-01 1993-12-07 Jeffrey Stewart Table top parylene deposition chamber
US5488833A (en) * 1994-09-26 1996-02-06 Stewart; Jeffrey Tangential flow cold trap
US6570140B2 (en) * 1999-06-23 2003-05-27 Telefonaktiebolaget Lm Ericsson (Publ) Device for heating shrinkable sleeves
US6737224B2 (en) 2001-04-17 2004-05-18 Jeffrey Stewart Method of preparing thin supported films by vacuum deposition
US20080022745A1 (en) * 2004-05-21 2008-01-31 Paul Robbins Thermal Control Extrusion Press Container
US7594419B2 (en) * 2004-05-21 2009-09-29 Paul Robbins Thermal control extrusion press container

Also Published As

Publication number Publication date
DE1527794A1 (de) 1970-04-30
GB1092018A (en) 1967-11-22

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