EP0845196A1 - Galette for heating a running synthetic thread - Google Patents
Galette for heating a running synthetic threadInfo
- Publication number
- EP0845196A1 EP0845196A1 EP97928210A EP97928210A EP0845196A1 EP 0845196 A1 EP0845196 A1 EP 0845196A1 EP 97928210 A EP97928210 A EP 97928210A EP 97928210 A EP97928210 A EP 97928210A EP 0845196 A1 EP0845196 A1 EP 0845196A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- godet
- carrier
- shaped
- galette
- coil carrier
- 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.)
- Granted
Links
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
-
- 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
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
- D02J13/005—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one rotating roll
Definitions
- the invention relates to a godet for heating a running synthetic thread according to the preamble of claim 1.
- Such godets are known.
- US Pat. No. 3,508,024 describes a godet for heating a running thread which has more than two stationary primary windings arranged axially one after the other and a magnetically conductive godet jacket which is rotatably mounted concentrically with the primary windings and which has a narrow radial gap with the primary windings is inductively connected to generate secondary currents.
- the carrier of the primary windings is made up of several layered transformer sheets, which are attached perpendicular to the axis of the coil carrier.
- the primary windings are operated with an alternating current of adjustable frequency by means of a respective control circuit, the primary windings being enclosed in an oscillating circuit which is tuned to the set frequency.
- the resonant circuit can be switched on or off as a function of the measured temperature on the godet jacket by means of corresponding power switches in cooperation with assigned temperature controllers.
- a similar godet is described in GB 989,349, in which a primary winding is fastened on a round carrier arranged concentrically in a hollow cylindrical godet jacket.
- all flat transformer sheets of the primary winding support are layered in the axial direction on the coil support.
- the laminated iron sheets are arranged in such a way that annular, concentric air gaps are formed which are radial to the axis of rotation of the godet.
- the magnetic flux in the carrier designed in this way is also not optimal, because boundary layers are formed by transformer sheets joined axially one behind the other. A certain amount of energy is required to overcome these boundary layers, which causes a loss of performance. In particular in the case of high-frequency use with, for example, 2 kHz and more, the power loss increases dramatically because of thicker boundary layers.
- the magnetic flux in particular towards the coil carrier, is shielded, it is prevented that a stray field can escape to the outside. This also enables an optimal magnetic flux, which does not have to overcome any boundary layers and effectively shields sections which are not to be heated.
- the special construction and arrangement of the transformer plates ensure better heating of the godet casing because the stray field within the godet is considerably reduced.
- Another advantage is that commercially available cutting tape cores can be used to hold the windings. This simplifies the manufacturing process and reduces costs.
- the gap formed between adjacent cutting tape cores only leads to a very small stray field, which has no influence on the current generated and thus the temperature in the godet jacket.
- the surface shape of the groove base over which the carrier is arranged on the coil carrier simplifies assembly.
- Thin transformer sheets up to a thickness of 0.01 mm can also be used for the high-frequency application. Since the penetration depth of the magnetic flux decreases with increasing frequency and the conduction of the magnetic flux takes place exclusively on the surface, thin sheets of this type are expedient in order to keep the power loss as low as possible.
- Figure 1 is a sectional view through an inductively heated godet.
- FIG. 2 shows an enlarged illustration of the groove base according to area A in FIG. 1; / 49265 PC17EP97 / 03121
- FIG. 3 shows an embodiment of the carrier according to area B in FIG. 1, which has a plurality of transformer sheets stacked in a U-shape,
- 4C further embodiments of the cutting band core according to area B in FIG. 1, which consists of separate legs and a separate groove base;
- FIG. 5 shows a sectional view through the godet according to FIG. 1, the arrangement of a plurality of segment-like cutting tape cores on the circumference of the carrier being shown,
- FIG. 6 shows a sectional view through the godet according to FIG. 1, and FIG. 4A or 4B or 4C, an annular separate leg 3b being shown,
- FIG. 7 shows a sectional view similar to FIG. 6, but with the leg 3b shown being of star-shaped design
- Fig. 8 is a partial view, wherein the attachment of the cutting tape core is shown on the carrier
- FIG. 1 In the case of an inductively heated godet shown in FIG. 1, a plurality of carriers 3 axially located on a coil carrier 5, each with a primary winding 1, are provided. A godet casing 2 is clamped on a spindle 9 mounted in two bearings 8 by means of a cone arrangement 7. The bearings 8 are supported on a fixed receiving body 1 1.
- the godet casing 2 is essentially U-shaped in cross-section and has a central opening on its end wall 2 a, which is delimited by an essentially cylindrical inward projection 13, which has an inner cone 7, which fits a cone of the spindle 9 At the free end of the spindle 9 there is a thread on which a nut 10 for fixing the godet casing 2 can be fastened on the spindle 9.
- the receiving body 11 extends in shape a hollow cylinder, a coil carrier 5 via the spindle 9 almost to the end wall 2a of the godet casing 2.
- Several carriers 3 are arranged on the coil carrier 5 in the axial direction one behind the other on the circumference of the coil carrier 5.
- the carriers 3 each have a groove base 3a and legs 3b arranged at a distance from one another, so that a U-shaped annular space is formed which serves to receive the primary winding 1.
- the legs 3b extend to just before the inner surface of the godet casing 2, two adjacent legs 3b each form a defined radial gap 4 of a dimension corresponding to the leg width with this inner lateral surface
- the primary windings 1 arranged in the carriers 3 can be controlled separately by means of a corresponding control device (not shown), so that an essentially constant temperature can be achieved along the outer surface of the godet jacket 2.
- a corresponding control device not shown
- the rotating godet casing 2 Via the annular gaps 4 between the legs 3b and the inner jacket surface of the godet casing 2, which is magnetically conductive, the rotating godet casing 2 is magnetically coupled, so that a voltage is induced in the godet casing, which results in a current flow.
- the current flow in the godet casing along the circumference is caused by the electrical resistance of the Galette materials, heating as a result of the targeted switching on and off of the coil voltage, the temperature in the godet jacket can thus be set them radially over lie to each other 2 shows a locally enlarged sectional view of the groove base 3a, in which the transformer plates are stacked radially one above the other in the region of the groove base
- the supports 3 are formed in such a way that the layered transformer sheets are stacked in a U-shape into so-called cut tape cores, ie the transformer sheets are in the radial direction and not - as is generally known - Layered in the axial direction
- a plurality of U-shaped ribbon cores 3 are arranged in segments to form a plurality.
- the segment-shaped cutting cores 3 arranged on the circumference of the coil carrier in the circumferential direction without any spacing from one another thus form a winding carrier for a primary winding.
- the advantage of using cutting cores 3 then maintains that the magnetic flux is shielded from the outside, in particular also towards the coil carrier 5, so that no stray field can emerge to the outside.
- the layered transformer plates are stacked in a U-shape. This also enables an optimal magnetic flux.
- the no limit switch In the case of transformer sheets which are arranged one behind the other in the axial direction, in the case of high-frequency use with, for example, 2 kHz thicker boundary layers are caused, which lead to a considerable increase in resistance.
- the surface of the groove base 3a on which the step tape core 3 on the Carrier 5 is arranged is either substantially flat or adapted to the surface of the carrier 5 and touches the surface of the carrier 5 The winding takes place in the circumferential direction.
- the free ends of the legs 3b of the cutting band cores are rounded in such a way that there is between the godet casing 2 and the free end of the legs 3b forms an essentially constant radial dial gap 4.
- the gap 14 formed between adjacent cutting core 3 leads only to a very small stray field which has no influence on the current generated and thus the temperature in the godet tel 2 hat
- the cutting tape cores of the adjacent primary windings can be arranged offset to one another in such a way that gaps 14 limited axially around the width of the legs 3b form
- the carrier 3 consists of separate legs 3b and a separate groove base 3a.
- the groove base 3a of the carrier 3 is a hollow cylinder made of several transformer sheets stacked in the radial direction.
- the legs 3b of the carrier 3 have several axially stacked ones ring-shaped transformer plates on the radial stray field guided between the groove base 3a and the legs 3b is very small, which is why there is no influence on the current generated and thus on the temperature in the godet casing 2
- the carrier 3 consists of separate legs 3b and a separate groove base 3a.
- the groove base 3a of the carrier 3 is a hollow cylinder composed of a plurality of Irafo sheets stacked in the radial direction.
- the legs 3b of the cutting band core 3 have several stacked ones annular transformer plates on the axial stray field guided between the groove base 3a and the legs 3b is very small, which has no influence on the current generated and thus on the temperature in the godet casing 2
- the carrier 3 consists of separate legs 3b and a separate groove base 3a.
- the groove base 3a of the cutting band core 3 is a hollow cylinder made of several transformer sheets stacked in the radial direction.
- the legs 3b of the carrier 3 have several stacked ones ring-shaped transformer before that between the groove base 3a and the legs 3b oblique stray field is very small, which is why there is no influence on the current generated and thus on the temperature in the godet casing 2.
- FIG. 6 shows a shape of the leg 3b which can be combined both with the arrangement in FIG. 4A and with the arrangement in FIG. 4B.
- the leg 3b is stacked from a plurality of annular transformer sheets. This arrangement is particularly low-loss since the radial gap 4 between the leg 3b and the godet casing 2 is designed to be essentially constant all the way without interruptions. The magnetic leakage flux is very low.
- FIG. 7 shows another form of the leg 3b, which can be combined both with the arrangement in FIG. 4A and with the arrangement in FIG. 4B, in which each annular transformer plate has a star-shaped outer edge.
- the transformer plates are stacked axially so that the star-shaped outer edges are aligned axially one after the other
- FIG. 8 shows a possible fastening of the carrier 3 on the coil carrier 5, in which, for example, the carriers 3 designed as cutting tape cores are each fastened to the coil carrier 5 of the godet 2 with at least one screw 6.
- U-shaped layered transformer sheets in particular of the cutting tape cores, has the further advantage that the thin sheets required for high-frequency use can be used up to 0.01 mm. Since the penetration depth of the magnetic flux decreases with increasing frequency and the power of the magnetic flux takes place exclusively on the surface, thin sheets of this type are required in order to keep the power losses lower
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- General Induction Heating (AREA)
- Resistance Heating (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19624266 | 1996-06-18 | ||
DE19624266 | 1996-06-18 | ||
PCT/EP1997/003121 WO1997049265A1 (en) | 1996-06-18 | 1997-06-16 | Galette for heating a running synthetic thread |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0845196A1 true EP0845196A1 (en) | 1998-06-03 |
EP0845196B1 EP0845196B1 (en) | 2002-11-27 |
EP0845196B2 EP0845196B2 (en) | 2011-07-06 |
Family
ID=7797255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97928210A Expired - Lifetime EP0845196B2 (en) | 1996-06-18 | 1997-06-16 | Galette for heating a running synthetic thread |
Country Status (7)
Country | Link |
---|---|
US (1) | US5970592A (en) |
EP (1) | EP0845196B2 (en) |
KR (1) | KR100446346B1 (en) |
CN (1) | CN1135908C (en) |
DE (1) | DE59708815D1 (en) |
TW (1) | TW354339B (en) |
WO (1) | WO1997049265A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7105784B2 (en) * | 2003-03-24 | 2006-09-12 | Kabushiki Kaisha Toshiba | Fixing device |
US6861627B2 (en) * | 2003-03-26 | 2005-03-01 | Kabushiki Kaisha Toshiba | Induction heat fixing device |
EP1614783B1 (en) * | 2004-07-06 | 2007-10-10 | SSM Schärer Schweiter Mettler AG | Inductor core for a heatable galette |
EP1805358B1 (en) * | 2004-10-14 | 2011-03-23 | Oerlikon Textile GmbH & Co. KG | Galette for guiding, heating and transporting a thread |
PL2020160T3 (en) * | 2006-04-24 | 2018-01-31 | Inductoheat Inc | Electric induction heat treatment of an end of tubular material |
CN101431884B (en) * | 2008-12-11 | 2013-03-20 | 马嘉惠 | Electromagnetic shielding device matched with radio frequency focusing heating mechanism |
CN115198419B (en) * | 2022-08-12 | 2023-09-26 | 昆山联滔电子有限公司 | Braided wire hot press |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB858855A (en) * | 1956-05-15 | 1961-01-18 | Wild Barfield Electr Furnaces | Induction heated rotary rollers |
NL283604A (en) * | 1961-09-26 | 1900-01-01 | ||
GB1121860A (en) * | 1964-11-21 | 1968-07-31 | Tokushu Denki Kabushiki Kaisha | A heating rotary drum apparatus |
BE716725A (en) * | 1965-12-03 | 1968-12-02 | ||
US3412229A (en) * | 1966-10-20 | 1968-11-19 | Cameron Brown Capital Corp | Electric heating means |
RO55797A (en) * | 1967-08-16 | 1974-01-03 | ||
DE1660235C3 (en) * | 1967-08-16 | 1980-06-26 | Barmag Barmer Maschinenfabrik Ag, 5600 Wuppertal | Induction heatable galette |
US3448233A (en) * | 1967-09-26 | 1969-06-03 | Pillar Corp | Induction heating assembly |
US3508024A (en) * | 1968-06-17 | 1970-04-21 | Gen Electric | Dual inductance induction heater |
BE736709A (en) * | 1968-10-24 | 1969-12-31 | ||
US3562472A (en) † | 1969-08-20 | 1971-02-09 | Gen Electric | Induction heater for rotating godet |
GB1319318A (en) * | 1970-07-01 | 1973-06-06 | Platt International Ltd | Inductively heatable roller having a temperature sensor |
JPS6139394A (en) * | 1984-07-30 | 1986-02-25 | トクデン株式会社 | 3-phase annular laminated core leg type rotary roller |
US5159166A (en) * | 1988-06-30 | 1992-10-27 | Rieter Machine Works, Ltd. | Drawroll unit |
DE58909654D1 (en) * | 1988-06-30 | 1996-05-23 | Rieter Ag Maschf | Wide speed range godet |
DE59202786D1 (en) * | 1991-04-27 | 1995-08-10 | Barmag Barmer Maschf | Galette for heating a running thread. |
DE4339903A1 (en) * | 1992-12-03 | 1994-06-09 | Barmag Barmer Maschf | Induction heated conical godet roller for yarn - has cylindrical induction coil core with varying length projections on inside of shell |
CH690599A5 (en) * | 1994-11-10 | 2000-10-31 | Barmag Barmer Maschf | Galette for heating and conveying threads. |
-
1997
- 1997-06-16 EP EP97928210A patent/EP0845196B2/en not_active Expired - Lifetime
- 1997-06-16 CN CNB971907315A patent/CN1135908C/en not_active Expired - Fee Related
- 1997-06-16 KR KR10-1998-0700959A patent/KR100446346B1/en not_active IP Right Cessation
- 1997-06-16 WO PCT/EP1997/003121 patent/WO1997049265A1/en active IP Right Grant
- 1997-06-16 DE DE59708815T patent/DE59708815D1/en not_active Expired - Lifetime
- 1997-06-16 US US09/011,848 patent/US5970592A/en not_active Expired - Fee Related
- 1997-06-18 TW TW086108517A patent/TW354339B/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9749265A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1997049265A1 (en) | 1997-12-24 |
DE59708815D1 (en) | 2003-01-09 |
EP0845196B2 (en) | 2011-07-06 |
TW354339B (en) | 1999-03-11 |
KR100446346B1 (en) | 2004-10-14 |
EP0845196B1 (en) | 2002-11-27 |
CN1135908C (en) | 2004-01-21 |
US5970592A (en) | 1999-10-26 |
CN1196864A (en) | 1998-10-21 |
KR19990036291A (en) | 1999-05-25 |
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