US3652817A - Electrically heated roller arrangements - Google Patents
Electrically heated roller arrangements Download PDFInfo
- 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
Links
- 230000004907 flux Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 2
- 241000428199 Mustelinae Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
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)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- General Induction Heating (AREA)
- Manufacture Of Motors, Generators (AREA)
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 (da) |
CH (1) | CH535300A (da) |
DE (1) | DE2060195A1 (da) |
FR (1) | FR2073607A5 (da) |
GB (1) | GB1302039A (da) |
Cited By (2)
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)
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)
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 |
-
1969
- 1969-12-15 GB GB6102169A patent/GB1302039A/en not_active Expired
-
1970
- 1970-12-08 DE DE19702060195 patent/DE2060195A1/de active Pending
- 1970-12-09 CH CH1817470A patent/CH535300A/de not_active IP Right Cessation
- 1970-12-11 FR FR7044687A patent/FR2073607A5/fr not_active Expired
- 1970-12-14 US US97970A patent/US3652817A/en not_active Expired - Lifetime
Patent Citations (3)
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)
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 |
DE2060195A1 (de) | 1971-09-02 |
FR2073607A5 (da) | 1971-10-01 |
GB1302039A (da) | 1973-01-04 |
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