US3652817A - Electrically heated roller arrangements - Google Patents

Electrically heated roller arrangements Download PDF

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Publication number
US3652817A
US3652817A US97970A US3652817DA US3652817A US 3652817 A US3652817 A US 3652817A US 97970 A US97970 A US 97970A US 3652817D A US3652817D A US 3652817DA US 3652817 A US3652817 A US 3652817A
Authority
US
United States
Prior art keywords
shell
core member
arrangement according
shaft
coil
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
US97970A
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English (en)
Inventor
Joseph France
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.)
T T M RESEARCH Ltd
Ttm Research Ltd
Original Assignee
T T M RESEARCH Ltd
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 T T M RESEARCH Ltd filed Critical T T M RESEARCH Ltd
Application granted granted Critical
Publication of US3652817A publication Critical patent/US3652817A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/14—Tools, e.g. nozzles, rollers, calenders
    • H05B6/145—Heated rollers

Definitions

  • An electrically heated roller has an electric coil mounted in the core member of the assembly.
  • the core has a plurality of slots extending inwardly from the periphery of the core 11 158 Field of Search ..2l9/l0.61,469 member a rad! respect m the and parallel to the axis of the coil.
  • the slots serve to reduce local eddy currents, and to provide air cooling passages.
  • the arrangement comprises a magnetizable cylindrical shell over which the yarn to be heated is passed.
  • the shell is fixedly mounted on one end of a rotatable driving shaft so that the skirt portion of the shell extends along the shaft in concentric relation thereto.
  • Inside the skirt portion of the shell is a stationarily arranged magnetic core upon which is wound an electric coil to be supplied with energizing current from an alternating current source.
  • the magnetic flux generated in the core by the passage of the energizing current through the coil passes through the shell to produce heat therein.
  • the core on which the coil is wound is made from a plurality of laminations in order to reduce the heating effect of local eddy currents in the core.
  • a laminated core is however expensive to produce and presents difficulties in manufacture and assembly.
  • An object of the present invention is to provide a magnetic core which retains advantages of the laminated core but is of less complex construction.
  • an electrically heated roller arrangement for use in the processing of synthetic yarns or filaments, comprising a rotatable magnetizable shell in the form of a solid of revolution, over which the yarn to be heated is passed, a magnetic core member arranged within the shell and an electrical energizing coil which is wound in a peripheral recess in the core member in concentric relation to the axis of revolution of the shell and which generates by the passage of energizing current therethrough a magnetic flux which passes through the shell to produce heat therein, said core member having a plurality of slots extending inwardly from the periphery of the core member in a radial direction with respect to the coil and parallel to the axis of the coil.
  • the slots project radially inwardly beyond the internal diameter of the energizing coil, with each slot extending also axially throughout the length of the core member to provide a passage for air through the core member and along the inside of the energizing coil.
  • the shell is a cylindrical or substantially cylindrical shell
  • the core member is of cylindrical or substantially cylindrical form and said recess is a circumferential recess formed in the outer cylindrical surface of the core member.
  • FIG. 1 is a sectional side elevation of a heated roller arrangement according to the invention.
  • F 10. 2 is a section taken on the line [1-11 in FIG. 1.
  • the heated roller arrangement shown comprises a shaft 1 rotatable with a bearing 2 fixed in a housing 3.
  • a roller 4 is closed at one end where it is fixed to the projecting end of the shaft 1 and has a skirt portion 5 extending back along the shaft and concentrically with respect thereto.
  • a magnetizable core 6 which has a circumferential recess 7 which houses an electric coil 8.
  • the core 6 is stationarily mounted on a sleeve 9 which is secured to the housing 3 by screws 10.
  • the coil 8 is, in operation, supplied with energizing current from an alternating current source, the magnetic flux generated in the core 6 by the passage of the energizing current through the coil passing into the shell 5 and producing a heating effect therein.
  • the core 6 has, as best seen in FIG. 2, a plurality of longitudinal slots 11 extending radially inwardly from its periphery to a position beyond the internal diameter of the coil so as to provide air gaps 12.
  • the slots 11 serve to reduce local eddy currents in the core by ensuring that the flux paths extend along planes passing through the axis of rotation of the shaft 1 and furthermore serve to keep down the temperature of the core and the coil 8 by providing passages for air through the core 6 and along the inside of the coil 8.
  • impeller 13 Further cooling of the elements contained within the skirt portion 5 of the roller 4 is effected by an impeller 13 fitted to the shaft 1.
  • the impeller 13 creates a circulation of air within the shell, which further assists in cooling the core 6 and the coil 8.
  • the electric heating control arrangement may be as described in the specification of our British Pat. No. 989,349.
  • An electrically heated roller arrangement for use in the processing of synthetic yarns or filaments, comprising a rotatable magnetizable shell in the form of a solid of revolution for heating said synthetic filaments, a magnetic core member mounted within said shell and having a peripheral recess, an electrical energizing coil wound in said peripheral recess in concentric relation to the axis of revolution of said shell and for generating a magnetic flux which passes through said shell to produce heat therein, and said core member having a plurality of slots extending inwardly from the periphery of the length of the core member in a radial direction with respect to the coil and parallel to the axis of the coil beyond the internal diameter thereof to provide a passage through said core member and along the inside of said energizing coil.
  • said shell is open at one end and closed at the other end
  • said supporting shaft comprises a rotatable driving shaft
  • said closed end of the shell is fixedly mounted on one end of the shaft so that a skirt portion of the shell extends along the shaft.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Manufacture Of Motors, Generators (AREA)
US97970A 1969-12-15 1970-12-14 Electrically heated roller arrangements Expired - Lifetime US3652817A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6102169 1969-12-15

Publications (1)

Publication Number Publication Date
US3652817A true US3652817A (en) 1972-03-28

Family

ID=10486480

Family Applications (1)

Application Number Title Priority Date Filing Date
US97970A Expired - Lifetime US3652817A (en) 1969-12-15 1970-12-14 Electrically heated roller arrangements

Country Status (5)

Country Link
US (1) US3652817A (de)
CH (1) CH535300A (de)
DE (1) DE2060195A1 (de)
FR (1) FR2073607A5 (de)
GB (1) GB1302039A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5254070A (en) * 1991-02-26 1993-10-19 Barmag Ag Godet
CN112048799A (zh) * 2020-08-27 2020-12-08 王凯 一种基于信息技术的纺织材料蒸汽定型设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01217883A (ja) * 1988-02-25 1989-08-31 Jiyuuou:Kk 誘導加熱コイル用ボビン
GB2319583B (en) * 1996-11-25 1999-09-22 Ricoh Kk Device with induction heating roller

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187150A (en) * 1961-09-26 1965-06-01 Tmm Research Ltd Heating arrangements
US3435171A (en) * 1965-12-03 1969-03-25 Barmag Barmer Maschf Heated galette
US3487187A (en) * 1967-08-16 1969-12-30 Barmag Barmer Maschf Inductively heatable galette

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187150A (en) * 1961-09-26 1965-06-01 Tmm Research Ltd Heating arrangements
US3435171A (en) * 1965-12-03 1969-03-25 Barmag Barmer Maschf Heated galette
US3487187A (en) * 1967-08-16 1969-12-30 Barmag Barmer Maschf Inductively heatable galette

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5254070A (en) * 1991-02-26 1993-10-19 Barmag Ag Godet
CN112048799A (zh) * 2020-08-27 2020-12-08 王凯 一种基于信息技术的纺织材料蒸汽定型设备

Also Published As

Publication number Publication date
CH535300A (de) 1973-03-31
GB1302039A (de) 1973-01-04
FR2073607A5 (de) 1971-10-01
DE2060195A1 (de) 1971-09-02

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