CN101287313B - Wire winding apparatus for producing magnetic excitation coil and use method thereof - Google Patents
Wire winding apparatus for producing magnetic excitation coil and use method thereof Download PDFInfo
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- CN101287313B CN101287313B CN2008100991704A CN200810099170A CN101287313B CN 101287313 B CN101287313 B CN 101287313B CN 2008100991704 A CN2008100991704 A CN 2008100991704A CN 200810099170 A CN200810099170 A CN 200810099170A CN 101287313 B CN101287313 B CN 101287313B
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Abstract
The present invention discloses a winding device for manufacturing an exciting coil and manufacturing method thereof. The winding device includes a male mould, which shape matches with the inner shape of the exciting coil; a female mould setting with predetermined interval with the male mould, which shape matches with the outer shape of the exciting coil; as well as a controller, for guiding thread with coating surface into the predetermined interval; winding the thread around the male mould; applying current to the thread around the male mould; melting the coating surface of the winding thread by Joule heat which is generated by applying current to the winding thread; pressing the winding thread with melted coating surface to predetermined shape between the male mould and the female mould; as well as cooling the pressed thread so as to form preconcerted shape.
Description
The application is that application number is 200510072703.6, the applying date is on May 17th, 2005, the application people is Panasonic Electric Equipment Industrial Co.,Ltd, denomination of invention dividing an application for the Chinese invention patent application of " fixing device; imaging device, the Winder and the method for producing magnetic excitation coil ".
Technical field
The present invention relates to a kind of fixing device and a kind of imaging device of being furnished with this fixing device of inductance heating system, as using photocopier, facsimile machine or the printer of electro-photography apparatus or electrostatic recording form.The invention further relates to Winder and utilize Winder production to be used for the method for the magnetic excitation coil of inductance heating system.
Background technology
Usually, the fixing device of being installed in the imaging device such as printer or photocopier is designed to be energy-conservation and working at high speed.Therefore, the device of being furnished with the electromagnetic induction heating type heater can be widely used for replacing Halogen lamp LED and similar device.Existing electromagnetic induction heating type heater is applied to the magnetic field that magnetic excitation coil produces on the heating element, and heats this heating element subsequently.For example, this heater can be used as heating and is formed on the recording medium as the fixing device of the image of photographic fixing not on transfer paper or the OHP page or leaf.
The existing heater of being furnished with magnetic excitation coil is applied to the magnetic field that magnetic excitation coil produces on the cylindricality heat generating roller, and described thereupon cylindricality heat generating roller produces vortex flow in by the formed conducting shell in the top layer of heat generating roller.Subsequently, the Joule heat that is produced by described vortex flow heats this conducting shell.Normally, can set the shape of magnetic excitation coil effectively along the shape of cylindricality heat generating roller outside.It all is well-known being furnished with the fixing device and described two rollers that are suspended at the heat-resisting endless belt between fixing roller and the heat generating roller.Preferably, heat generating roller and the endless belt in the fixing device of being furnished with this type endless belt closely is provided with magnetic excitation coil.
For in the shape of magnetic excitation coil stably being kept approximate cylinder when before shape forms approximate cylindricality, magnetic excitation coil becomes required form (semicircle) in company with coil shape holding element (for example with reference to prior art 1).Further, when magnetic excitation coil being formed approximate post shapes, there is the even possibility of temperature distributing disproportionation of heating element.In order to make the uniformity of temperature profile of heating element, proposal part ground changes the distance between magnetic excitation coil and the heating element, makes itself and heating element far apart (for example with reference to prior art 2) so that partly change magnetic excitation coil.
[prior art 1] Japanese patent application 2000-243545
[prior art 2] Japanese patent application H9-26719
If the diameter of the heat generating roller in the fixing device forms forr a short time than the diameter of fixing roller, annular heatproof zone becomes fan-shaped towards the fixing roller broadening, and annular heatproof zone is suspended between fixing roller and the heat generating roller in described fixing device.In addition, there is the heatproof zone projection and approaching possibility along with the contact area between the heat generating roller of heatproof zone rotation.
Place near heat generating roller even will form with the magnetic excitation coil of the approximate half-circular that is complementary with heat generating roller curvature, the heatproof zone that the edge that the magnetic excitation coil open side also takes place and broadening become fan-shaped heatproof zone or projection is the problem of mutual interference mutually.For fear of the interference between magnetic excitation coil and the heatproof zone, the fitting limit of magnetic excitation coil can be limited in the contact area L between heat generating roller and the heatproof zone, and even now can not be made the demand that provides effective heating for the scope wideer than contact area L in order to satisfy by magnetic excitation coil closely is set.Separate the distance between heatproof zone and the magnetic excitation coil fully, make it can be not interfering with each other and avoid interference between magnetic excitation coil and the heatproof zone, also further make the problem that produces the poorer and heat producing losses of magnetic engagement between magnetic excitation coil and the heat generating roller.
In prior art 1, be fixed on after planar coil twines on the anchor clamps and winding wire is wrapped on the plane surface of above-mentioned coil shape holding element at coil shape holding element the plane, described coil is pressurized.Subsequently, the coil of general plane shape and coil shape holding element are heated to and reach softening temperature and be changed the shape that is shaped as coil surface.
When changing the flat shape coil of pressurization with the coil shape holding element according to demand, outside on the direction of a direction, exert pressure in that compression is inner, the inner institute of compression towards direction be the stretching copper cash towards bending direction with the magnetic excitation coil copper cash of general plane shape winding.Therefore, produce the insulating case of copper cash is exerted pressure and the problem of insulating case mis-behave.Especially, because twisted wire twined tens times extremely thin copper cash as this copper cash and the use of this twisted wire in the past, so there is significant problem in the magnetic excitation coil copper cash that uses in the induction heater.
Disclosed as prior art 2, if the amount of bow of magnetic excitation coil is used for making that heating is evenly distributed, exist too coil is applied more pressure and copper cash insulating case applied pressure is increased more problem.
Summary of the invention
The purpose that the present invention considers the problems referred to above and has the fixing device that a kind of electronic induction heating system is provided and be furnished with the imaging device of this fixing device, the contact area ground that does not limit between warm-up mill and the band is placed it in than the scope of the contact zone field width between warm-up mill and the band near warm-up mill and band.
In order to address the above problem, the fixing device that is used for the inductance heating system of the present invention comprises warm-up mill and produce the magnetic excitation coil of Joule heat in warm-up mill.Fixing device comprises the magnetic excitation coil location coil location device around the part of the periphery of hot-rolling, and with the fixing roller of toner image on recording medium.Fixing device comprises that Contact Heating roller and fixing roller periphery are transmitted to the band of fixing roller so that just will generate heat from warm-up mill.The coil location device further has the first surface roughly the same with the warm-up mill envelope curvature on opposed area, described opposed area is with warm-up mill and be with contacted contact area relative.The coil location device separates within a predetermined distance with band.The coil location device further has first extension that extends from the first end of the opposed area of described coil location device, and having second extension that extends from the second end of the opposed area of described coil location device, the distance that described first extension and described second extension and described band separate is greater than described predetermined distance
Therefore, can provide the high accuracy magnetic excitation coil and the manufacture method thereof that are applicable to induction heating, it forms the optimum magnetic field that is used for induction heating that is complementary with the heatproof zone shape.
A kind of Winder that is used to produce magnetic excitation coil comprises: formpiston, and the shape of formpiston is corresponding with the interior shape of magnetic excitation coil; Former, it can move towards formpiston, and be set to and formpiston between form predetermined gap, the shape of former is corresponding with the external shape of magnetic excitation coil; And controller, it is used for: the line that will have coating surface imports described predetermined gap; Twine described line around formpiston; Apply electric current to being wrapped in formpiston line on every side; By the coating surface of Joule heat fusing coiling, this Joule heat produces by coiling being applied electric current; The coiling that will have the coating surface that has melted between formpiston and former is pressed into reservation shape; And the coiling after the cooling extrusion is so that the coiling that will cool off is fixed into described predetermined shape.
A kind of method of using Winder to produce magnetic excitation coil, Winder comprises formpiston and former, the shape of formpiston is corresponding with the interior shape of magnetic excitation coil, and the shape of former is corresponding with the external shape of magnetic excitation coil, and this method comprises: move formpiston towards former; Between formpiston and former, form predetermined gap; The line that will have coating surface imports described predetermined gap; Twine described line around formpiston; Apply electric current to being wrapped in formpiston line on every side; By the coating surface of Joule heat fusing coiling, this Joule heat produces by coiling being applied electric current; The coiling that will have the coating surface that has melted between formpiston and former is pressed into reservation shape; And the coiling after the cooling extrusion is so that the coiling that will cool off is fixed into described predetermined shape.
Description of drawings
In following detailed explanation, with reference to shown in a plurality of figure, further describe the present invention by the limiting examples of exemplary embodiment of the present invention, wherein identical reference marker is represented identical parts in whole diagrammatic sketch, wherein:
Fig. 1 is the sectional view that magnetic excitation coil is used as the imaging device of fixing device that shows according to the embodiment of the invention;
Fig. 2 is the descriptive diagrammatic sketch that shows according to the fixing device of the embodiment of the invention;
Fig. 3 (a) is the top view of the magnetic excitation wire coil unit of induction heater in the fixing device that shows Fig. 2;
Fig. 3 (b) is the sectional view of the magnetic excitation wire coil unit of induction heater in the fixing device that shows Fig. 2;
Fig. 4 (a) is the perspective view of the simple magnetic excitation coil of the embodiment of the invention;
Fig. 4 (b) is the front view of the simple magnetic excitation coil of the embodiment of the invention;
Fig. 4 (c) is the sectional view of F-F line of the simple magnetic excitation coil of the embodiment of the invention;
Fig. 5 (a) is the end view of magnetic excitation coil, heat generating roller and the heating tape of modification example;
Fig. 5 (b) is the end view of magnetic excitation coil, heat generating roller and the heating tape of another modification example;
Fig. 5 (c) is the routine view of magnetic excitation coil, heat generating roller and the heating tape of another modification example;
Fig. 6 is the Winder perspective view of the embodiment of the invention;
Fig. 7 (a) is the end view of Winder shown in Fig. 6;
Fig. 7 (b) is the sectional view of line G-G;
Fig. 8 is the enlarged drawing of Fig. 7;
Fig. 9 (a) shows the shape at top of the formpiston of the embodiment of the invention;
Fig. 9 (b) shows the shape of the former of the embodiment of the invention;
Figure 10 (a) and 10 (b) show the state after first compressed elements extrusion action;
Figure 11 (a) shows wherein the state before the extrusion action that the part of coiling (winding) end breaks;
Figure 11 (b) shows the state after the extrusion action that the part of the end that wherein winds the line breaks;
Figure 12 is the perspective view of the Winder of the embodiment of the invention;
Figure 13 (a) is for wherein partly having revised the external view of formpiston bossing shape;
Figure 13 (b) is the sectional view of Figure 13 (a) midplane A;
Figure 13 (c) is the sectional view of Figure 13 (a) midplane A of formed magnetic excitation coil;
Figure 13 (d) is the sectional view of Figure 13 (a) midplane B;
Figure 13 (e) is the sectional view of Figure 13 (a) midplane B of formed magnetic excitation coil;
Figure 14 (a) is for wherein partly having revised the external view of former bossing shape;
Figure 14 (b) is the sectional view of Figure 14 (a) midplane A;
Figure 14 (c) is the sectional view of Figure 14 (a) midplane A of formed magnetic excitation coil;
Figure 14 (d) is the sectional view of Figure 14 (a) midplane B;
Figure 14 (e) is the sectional view of Figure 14 (a) midplane B of formed magnetic excitation coil;
Figure 15 (a) shows the example in the cross section of formpiston in the embodiment of the invention;
Figure 15 (b) shows the example in the cross section of former in the embodiment of the invention;
Figure 16 (a) is the heater sectional view of coil thickness of remodeling with embodiment of the invention;
Figure 16 (b) is the chart of the heat that is produced in the cross section that shows corresponding Figure 16 (a) on fixing roller;
Figure 17 (a) is the sectional view with heater of shim coil thickness; And
Figure 17 (b) is the chart of the heat that produces in the cross section that shows corresponding Figure 17 (a) on fixing roller.
Embodiment
Below, describe the first embodiment of the present invention in detail with reference to figure.Do not use identical symbol not do repeat specification for element that has same composition or function among each figure or respective regions.
First embodiment
An example of fixing device is described according to the heater of being furnished with magnetic excitation coil hereinafter.
Fig. 1 is the sectional view that shows imaging device of the present invention.In Fig. 1, when electrophotographic photosensitive material (below be called photosensitive drums) 11 during with the direction rotation of specific peripheral speed at arrow, the surface of photosensitive drums is recharged device 12 and fills with negative dark potential (dark electric potential) VO.Optical beam scanner 13 output is according to from image read-out or as the laser beam 14 modulated of the sequential electronic digit picture element signal imported of the main frame (not shown) of computer.The surface of the photosensitive drums 11 that these laser beam 14 scannings have been charged also makes its exposure.Thus, the exposed portion of photosensitive drums 11 reduces the current potential absolute value and becomes bright current potential VL, and and then formation electrostatic latent image.By this sub-image of electronegative toner development of developing parts 15 and make it clear.
Developing parts 15 is furnished with the developer roll 16 of rotation.Developer roll 16 is oppositely arranged with photosensitive drums 11 and forms toner thin layer on the outer surface of this roller.For developer roll 16 applies the development bias voltage.The absolute value of development bias voltage less than the dark potential VO of photosensitive drums 11 greater than bright current potential VL.Therefore, the toner on the developer roll 16 only is transferred to the bright current potential VL of photosensitive drums 11 and makes sub-image clear.
On the contrary, from 17 one pages of picking up assembly present recording medium 205 and (registration roller pair) 18 delivered to pinching (nip) zone of photosensitive drums 11 and transfer roll 19 with the synchronous appropriate time of photosensitive drums 11 rotation with it by alignment roller.Subsequently, by the transfer roll 19 that is applied with transfer bias on it toner image on photosensitive drums 11 is transferred on the recording medium 205 in turn.Remain in photosensitive drums 11 lip-deep any materials, separate the residual transfer printing toner in back as recording medium 205, imaging next time that device 20 removes and repeatedly offers is cleaned.
Recording medium 205 is guided by photographic fixing guide member 21 to the transmission of fixing device 22.After recording medium 205 and photosensitive drums 11 were separated, recording medium was sent to fixing device 22.Be transferred to timing diagram picture (timer image) on the recording medium 205 by this action institute photographic fixing.Transmission causes the device outside by the recording medium 205 picked guide members 23 of fixing device 22.Photographic fixing paper guide member 21 and pick up guide member 23 and can make by resin such as ABS.In addition, photographic fixing guide member 21 and pick up guide member 23 and can make by nonmagnetic substance such as aluminium equally.After the fusing toner image, recording medium 205 is directed to output panel (delivery tray) 24.
The base plate 25 of apparatus main body, the top board 26 of apparatus main body and apparatus main body casing 27 constitute an integral body and support the intensity of whole device.The stock of these elements is a magnet steel, and uses zinc-plating material to make these elements.
Cooling fan 28 is at the inner air-flow that produces of device.Coil cover 29 plays the effect of cladding element and contains nonmagnetic substance such as aluminium, just and be included to cover the rear surface and the arc magnetic core 106 of magnetic excitation coil 105.
Below, describe the fixing device that is installed in the imaging device shown in Figure 1 in detail.Fig. 2 is the side cross-sectional views that shows the fixing device structure.
Fixing device shown in Fig. 2 has as the heat generating roller 201 of cylindricality first rotary body and the fixing roller 202 that separates with this heat generating roller 201.The pili annulati torrid zone 203 as second rotary body is suspended between heat generating roller 201 and the fixing roller 202.The rotation of fixing roller 202 makes heat generating roller 203 rotate in the direction shown in the arrow A.Heating tape 203 is against the fixing roller 202 of ground pinching crimping backer roll 204.By backer roll 204 is crimped onto fixing roller 202, between two rollers, form the pinching zone.The temperature sensor 112 of detection heating tape 203 temperature is set at the central spot between heat generating roller 201 and the fixing roller 202.
On the contrary, the magnetic excitation wire coil unit is provided with pinching heating tape 203 and cover the peripheral surface of half at least of heat generating roller 201.The magnetic excitation wire coil unit closely is set extending, contacts with heating tape 203 at described contact area L heat generating roller 201 from contact area L to the wide region that only extends the zone (below be called the non-contact area) of specific range in the entrance and exit side of heating tape 203.
Fig. 3 (a) is for showing the top view of magnetic excitation wire coil unit, and Fig. 3 (b) be the sectional view (or B-B line sectional view, C-C line sectional view) of the middle A-A line of Fig. 3 (a).Fig. 4 (a) is the external view of magnetic excitation coil 105, and Fig. 4 (b) is the front view of magnetic excitation coil, and Fig. 4 (c) is the sectional view of F-F line among Fig. 4 (b).
The magnetic excitation wire coil unit has the magnetic excitation coil 105 that produces alternating magnetic field, form the arc magnetic core 106 of the arc of the rear surface that covers magnetic excitation coil 105, be arranged on the central magnetic core 107 of the coiling center of magnetic excitation coil 105, and the sidepiece magnetic core 108 that is arranged on the place, coiling bundle both sides of magnetic excitation coil 105.Kicker magnet as ferrite or permalloy, can be used as core material.
Central authorities' magnetic core 107 and sidepiece magnetic core 108 form magnetic circuit with arc magnetic core 106.Therefore, most of magnetic flux of being produced in heating tape 203 outsides of magnetic excitation coil 105 passes this magnetic core of three types and has reduced the magnetic flux that leaks into the magnetic core outside.In addition, these three kinds of magnetic cores are all dispensable.Can use a kind of magnetic core, its combination more or not to use magnetic core.In addition, central magnetic core 107 and sidepiece magnetic core 108 can combine with arc magnetic core 106 or the combination of materials used.
Magnetic core (opposing core) 110 is placed on the inside of heat generating roller 201 relatively.Kicker magnet can be used as the material of relative magnetic core 110 as ferrite or permalloy.Because magnetic core 110 passes most of magnetic flux that magnetic excitation coil 105 produces relatively, thus a small amount of magnetic flux is arranged to the magnetic excitation coil external leaks, and then make relative magnetic core 110 can effectively utilize the magnetic flux of magnetic excitation coil.
At this, describe the shape of magnetic excitation coil 105 in detail.As mentioned above, because magnetic excitation coil 105 is placed on the semicylinder 109a of coil holding element 109, so it has the shape roughly the same with semicylinder 109a.Although be of similar shape according to stable viewpoint magnetic excitation coil and the semicylinder of installing, the shape of magnetic excitation coil 105 needn't be identical with the shape of semicylinder 109a.
For semicylinder 109a, the relative position 109c relative with contact area L (Fig. 2) is formed roughly identical with the curvature of heat generating roller 201 surface of curvature, and the extension 109d that extends to flange 109b from the top of relative position 109c (L is relative with contact area) is placed near heating tape 203 (is fan-shaped towards fixing roller 202 broadenings) with the distance of almost determining.Yet extension 109d is formed the general plane shape of extending with the angle that can not contact.
Therefore, even heating tape 203 is fan-shaped towards fixing roller 202 broadenings, because the diameter of heat generating roller 201 is less than the diameter of fixing roller 202, so according to uniform distance relative position 109c is set closely with the curvature identical, and the non-contact area that extends to the entrance and exit both sides with respect to the top from contact area L is provided with extension 109d with uniform distance almost near heating tape 203 with contact area L.
The shape of the shape by making magnetic excitation coil 105 and the semicylinder 109a of coil holding element 109 is roughly the same, can be according to according to even distance magnetic excitation coil 105 being set closely with the curvature identical with contact area L with the similar mode of coil holding element 109, and magnetic excitation coil 105 with the non-contact area that extends to the entrance and exit both sides with respect to top from contact area L almost uniform distance be provided with near heating tape 203.
In other words, shown in Fig. 4 (c), for magnetic excitation coil 105, form curved surface 105a with the curvature identical with heat generating roller 201, this curved surface is relative with the contact area L that has with heat generating roller 201 same curvature, and becoming fan-shaped heating tape 203 extension 105b to be formed generally flat surface with almost fixing distance with respect to broadening, described extension 105b is relative with the non-contact area that extends to the entrance and exit both sides from contact area L top.
Because the shape of magnetic excitation coil 105 makes its place of relative position separately at the curved surface of the curved surface of corresponding contact area L and non-contact area have identical curved surface or flat surface (in this example, flat surface has infinitely-great curvature), so can be increased in the surface area of the generation of the vortex flow that flows in the heating tape 203 lip-deep conducting shells, and then can increase the heat that heating tape 203 produces.
Shown in figure 2 in the fixing device, because be applied with the object in the magnetic field of magnetic excitation coil 105 is that the contact area L with even curvature becomes fan-shaped flat with broadening, forms the shape of magnetic excitation coil 105 (with coil holding element 109) with the surface (105b) of curved surface (105a) peace that is complementary with these shapes.When be applied with magnetic field to as if different shapes, the shape of magnetic excitation coil 105 can form the coupling these difform a plurality of curved surfaces combination.The shape that also can form magnetic excitation coil 105 makes the extension with flat part and has the extension of another part of another curved surface that is different from curved surface (105a).
Fig. 5 (a) and (b) and the modification example that (c) shows the shape of magnetic excitation coil.
For the modification example shown in Fig. 5 (a), the extension H1 that extends from curved surface 105a at the tape entry place of magnetic excitation coil 105 almost is parallel to the shape that relative heating tape 203 extends and form flat surface.Be formed curved surface in the band exit from the extension H2 that curved surface 105a extends, described curved surface has the curvature corresponding to heating tape 203 projections.
According to fixing device,, also exist bossing not appear at the possibility at tape entry place although bossing may appear on the outside at tape entry place.For with such fixing device compatibility, the curvature of left and right sides extension H1, H2 (comprising flat surface) must according to the band situation change.According to the modification example shown in Fig. 5 (a), have bossing and only appear at the fixing device of taking the feature on mouthful outside out of and between magnetic excitation coil 105 and heating tape 203, maintain a certain distance usually, so that can apply uniform magnetic field.
Modification example shown in Fig. 5 (b) is such example, wherein two extension H1 that extend along both direction from curved surface 105a in the tape entry and the band exit of magnetic excitation coil 105 almost are parallel to the shape that relative separately heating tape 203 extends and form flat surface.Especially, extension H1 extends the horizontal line that the rotating shaft that surpasses heat generating roller 201 towards fixing roller 202 passes.Usually, because all magnetic excitation coil is formed with uniform curved, so be difficult to fully keep length.If bossing does not appear at the tape entry and the band exit of magnetic excitation coil 105, product of the present invention also can fully be kept the length of extension H1, as Fig. 5 (b).At Fig. 5 (a) with in the modification example (c), because being formed situation about making according to band, the curved shape of extension H1, H2 keeps even distance, so can keep the length of extension in the mode that is similar to modification example shown in Fig. 5 (b).
Because can be by in magnetic excitation coil 105, keeping the length of extension H1 in this manner fully, to apply magnetic field equably, so can improve heating efficiency than wideer before scope.
For the modification example shown in Fig. 5 (c), the extension H1 that extends from curved surface 105a at the tape entry place of magnetic excitation coil 105, be formed to have the corresponding curved surface of the curvature of heating tape 203 projectioies relatively, and be with the exit from the extension H2 that curved surface 105a extends, be formed to have the corresponding curved surface of the curvature of heating tape 203 projectioies relatively.
According to fixing device, the possibility that exists bossing to appear at tape entry and take mouthful two places out of.For with this fixing device compatibility, the curvature of left and right sides extension H1, H2 must according to the band projection and bending.According to the modification example shown in Fig. 5 (c), have the fixing device that bossing appears at tape entry and takes the characteristic at mouthful two places out of, between magnetic excitation coil 105 and heating tape 203, keep certain distance usually, so that can apply uniform magnetic field.
Fig. 5 (a) and (b) and (c) shown in each extension (H1, H2) of magnetic excitation coil only extend 5mm from the horizontal line that the rotating shaft (initial point O) of heat generating roller 201 is passed towards the fixing roller side.Experimental result finds that heating tape 203 is from initially being shortened to 170 ℃ of required times.The length that the horizontal line that extension (H1, H2) is passed from the rotating shaft (initial point O) of heat generating roller 201 extends towards the fixing roller side is preferably 10mm and still less.If length surpasses 10mm, reduce and combination between the relative magnetic cores 110 of heat generating roller 201 inner placements.
Next, explanation is constituted the material of the element of fixing device.
For example, Fe, the Ni alloy (as SUS) by Fe, Ni and hollow, cylindricality and strong magnetic metal material forms heat generating roller 201.External diameter for example is 10mm to 30mm, and thickness for example is 0.1mm to 0.2mm.Synthetic has low thermal capacity and rises thermal property fast.
Fixing roller 202 for example comprise the metal magnetic core 202a that makes as SUS by metal and cover as described in metal magnetic core 202a and solid or foam silicone rubber flexible member 202b with heat-resistant quality.For the pressure that utilizes backer roll 204 forms the contact area (pinching zone N) with specific width between fixing roller 202 and backer roll 204, external diameter is 20mm to 40mm and bigger than the diameter of heat generating roller 201.The thickness of flexible member 202b is that 3mm to 8mm and hardness are 15 ° to 50 ° (requiring C).
Because this makes the thermal capacity of heat generating roller 201 less than the thermal capacity of fixing roller 202, so can heat heat generating roller 201 apace and shorten warm-up time.
By have 360 (℃) disperse the conduction powders base material in the polyimides of glass transition point, as iron powder, aluminium powder, silver powder or copper powder, and form the diameter of the 30mm to 60mm with formation conducting shell and the extremely thin endless belt of 40 μ m to 100 μ m thickness, produce described heating tape 203.Can form conducting shell by the thick silver layer of 2 or 3 10 μ m of stratification.In addition,, comprise the thick releasing layer (not shown) of 5 μ m of fluororesin, cover the surface of heating tape 203 for release (release) characteristic is provided.The glass transition point of the base material of heating tape 203 is preferably 200 in the scope of (℃) to 500 (℃).In addition, have independent or the synthetic resin or the rubber of good release characteristics, can be used as the releasing layer on heating tape 203 surfaces as PTFE, PFA, FEP, silicon rubber or fluorubber.
Except that above-mentioned polyimide resin, have the resin of heat-resistant quality, as fluororesin or metal, as thin nickel plate of electric smelting (electrocast) and thin corrosion resistant plate, also can be as the base material of heating tape 203.For example, this heating tape 203 can have thick copper facing of 10 μ m or the thick electric smelting nickel strap of 30 μ m to 60 μ m on the surface of thick SUS430 (magnetic) of 40 μ m or SUS304 (non magnetic).
Although preferably form rubber layer, when heating tape 203 is used as the image heater of heat fixer of monochrome image, can guarantee release characteristics so that provide elasticity during as the imaging heater of coloured image heat fixer at heating tape 203.
Stranded wire harness by synthetic 1 to 10 bundle forms the copper cash that uses in the magnetic excitation coil 105.Stranded wire harness comprises the kind of thread elements with φ 0.05 to φ 0.2 diameter.Stranded wire harness uses wire harness combination and the coil thickness of maximum outside diameter 2mm to can be 2mm.In order to be fit to thinner coil, the quantity of the bundle zygonema of a stranded wire harness should comprise 10 to 40 lines.Can use the external diameter that calculates twisted wire according to the formula 1 of JIS C3005.
Formula 1
In this formula, D is the external diameter of twisted wire, and d is the external diameter of kind of thread elements, and n is the quantity of kind of thread elements.
By in wrap wire, merging a plurality of stranded wire harness, can keep coiling tightness ground wrap wire at the thickness portion of magnetic excitation coil and the thin part place of magnetic excitation coil.Because the high-frequency AC electric current then causes excessive heating in magnetic excitation coil, make the resistance that has greater than the kind of thread elements diameter of φ 0.2 linear diameter become big.
In the combination of above-mentioned fixing device, the driving power (not shown) is that magnetic excitation coil 105 applies the high-frequency AC electric current of 10kHz to 1MHz or is more preferably the high-frequency AC electric current of 20kHz to 800kHz.This AC electric current produces alternating magnetic field between magnetic excitation coil 105, arc magnetic core 106, central magnetic core 107 and sidepiece magnetic core 108 and relative magnetic core 110.And then, the contact area L between heat generating roller 201 and heating tape 203 and near place, the non-contact area of this contact area, this action of alternating magnetic field is on heat generating roller 201.Vortex flow flows in the direction that stops these regional internal magnetic fields to change.
This vortex flow produce corresponding to the resistance of heat generating roller 201 Joule heat and main subsequently between heat generating roller 201 and heating tape 203 contact area L and near the place, non-contact area of this contact area, by electromagnetic induction heating effect heating heat generating roller 201.
Temperature on Jia Re heating tape 203 inner surfaces is detected by temperature sensor 112 by this way, and described temperature sensor comprises the high-temperature components with heat sensitivity in the porch of photographic fixing pinching zone N, as thermistor.
Therefore the surface of heating tape 203 because temperature sensor 112 can not swiped, can guarantee fixing performance with temperature constantly before entering the photographic fixing pinching zone N of just detected heating tape 203.After this, by entering heater 100 according to the signal controlling electrical power that with this temperature information serves as basis output with the temperature stabilization of heating tape 203 maintain 170 ℃.
When the toner image 206 that is formed on the recording medium 205, when the imaging region (not shown) place on being arranged at the upstream side of fixing device is introduced into photographic fixing pinching zone N, under the situation that difference diminishes between the front surface temperature of the heating tape 203 that the heater 100 that comprises magnetic excitation wire coil unit and heat generating roller 201 is heated and the rear surface temperature, toner image 206 is sent into photographic fixing pinching zone N.Therefore, the front surface temperature becomes very high than design temperature, that is to say, can limit to overregulate (overshoot) and stably control temperature.
Hereinafter, will the manufacture method of magnetic excitation coil be described.
With reference to Fig. 6 to 11 the initial manufacturing that produces the Winder of magnetic excitation coil 105 is described.
Fig. 6 is the perspective view of the Winder of the above-mentioned magnetic excitation coil 105 of generation.Illustrate the state that formpiston and former separate.Fig. 7 (a) and 7 (b) show the state of formpiston and former joint.Fig. 7 (a) is the sectional view of G-G line in Fig. 7 (a) for end view Fig. 7 (b).Fig. 8 is the enlarged drawing of Fig. 7.
Bobbin winoler has formpiston 301, and the former 302 that forms coiling gap S (Fig. 8) and engage with interior spiral shell 301 between formpiston 301.
Center at the bossing 301a of formpiston 301 is provided with centrepin (key) 305.First pressurizing member 303 is set in the both sides of bossing 301a, freely slide so that lean on the side surface of bossing 301a, and formpiston coiling guide member 304 is set dividually and it is arranged on the place, two ends longitudinally of bossing 301a with bossing 301a.
By with the flat surface of extrusion direction right angle intersection in first pressurizing member 303, formpiston 301 is fixed on the rotating disk 401 that can rotate.First pressurizing member 303 also is fixed to and press-fits the plate (not shown) on the above-mentioned Winder.
Shown in Fig. 7 (a), against the fixing formpiston guiding driving element 307 of installation elements 303a, 303b, the projected side wall of described installation elements from the both sides of first pressurizing member 303 is on formpiston coiling guide member 304.Drive source is that the drive unit of inflator comprises described formpiston guiding driving element 307.Support each formpiston coiling guide member 304 via each formpiston guiding driving element 307.
Figure 11 (a) and (b) show the relation that is embedded between copper cash bundle W, first pressurizing member 303 and the formpiston guide member 304 of coiling in the S of gap.As shown in the figure, on formpiston coiling guide member 304, a side of the lower surface on from top edge to installation side, form italic (taper) 304a towards formpiston guiding driving element 307.Italic 304a plays the effect that the guiding copper cash enters coiling gap S and wrap wire.Further, formpiston coiling guide member 304 has the pressure-producing part 304b of downward extruding copper cash bundle, and described copper cash bundle is introduced into coiling gap S and is being wrapped on the bossing 301a when the copper cash bundle is pushed on vertical both sides.When the copper cash bundle around the bossing 301a that is wrapped in formpiston 301 from the extruding of vertical both sides, each formpiston guiding driving element 307 moves formpiston coiling guide member 304 in the direction of arrow A.
On the contrary, shown in Fig. 8 and Fig. 9 (b), former 302 has the recess 302a of the curved surface of the bossing 301a that is formed on corresponding formpiston 301.In the center of recess 302a groove 302b is set.Groove 302b engages with centrepin 305.The recess 302a of former 302 is bigger and be set up and form the coiling gap S with even width than the bossing 301a of formpiston 301 slightly, described gap allows coiling to insert between bossing 301a and the recess 302a, as shown in Figure 8 when formpiston 301 and former 302 joints.The thickness of coiling gap S is preferably 1mm to 5mm.
As shown in Figure 6, the end place of two side that forms the recess 302a of former 302 in the vertical forms recess, and this recess forms the initial drawing opening 308 of coiling and coiling finishes drawing opening 309.In the end that just in time is positioned at the recess 302a sidewall on the coiling end drawing opening 309 one former coiling guide member 306 is set.In a similar fashion, another former coiling guide member 306 is set in the sidewall end relative with the end face of the recess 302a sidewall that forms the initial drawing opening 308 of coiling.Former coiling guide member 306 is used for extracting once more the lead that is drawn into coiling gap S owing to formpiston coiling guide member 304.Therefore, former coiling guide member 306 stretches out from the installation site on the above-mentioned recess 302a sidewall until near the bottom of coiling gap S and form italic 306a.
The lower end of former 302 is fixed on the following rotating disk 402 of coiling.A terminal 310a of current electrode is provided with near the initial drawing opening 308 of the coiling on the upper surface of rotating disk 402, and the another terminal 310b of current electrode is set near coiling end drawing opening 309.
At this, the shape of the recess 302a that forms on the former 302 is described.Fig. 9 (b) is for being arranged on the sectional view of former 302 upper recess 302a.When recess 302a engages with formpiston 301,, promptly, have the curved surface identical with the curved shape of above-mentioned contact area L with top (zone C) facing surfaces that forms semi-cylinder bossing 301a near the surface of bottom (zone C).The specific region (regional H) that makes progress continuously from this surface near bottom (zone C) has the at a certain angle broadening identical with above-mentioned non-contact area and becomes fan-shaped flat surface configuration.
The material of formpiston 301, former 302, first pressurizing member 303 and formpiston coiling guide member 304 is a metal, as Fe, Al, brass, ferroalloy and aluminium alloy.Surface by metal plating technology or rust-proofing method protection mould.This plating can be that the chromium that nickel is electroplated, sample is electroplated (copy plating) or sclerosis is electroplated.The mould of former coiling guide member 306 can be a metal, as Fe, Al, brass or comprise the metal alloy of iron.In addition, can connect the metal wire of making by Fe, Al or brass by bent metal wire.It is 1 μ m to 10 μ m that electroplating thickness is preferably formed.
Below, the manufacture method of using the magnetic excitation coil that comprises above-mentioned Winder is described.
When Winder when the origin position of Winder shown in Fig. 6 begins, formpiston 301 moves down until specific location, engages and then form coiling gap S as Fig. 7 (a) and (b) and formpiston shown in Figure 8 301 and former 302 between two moulds subsequently.In this example, coiling gap S is formed approximate 1mm to 5mm.
Next, the multi beam copper cash is introduced into coiling gap S and is wrapped in the peripheral of bossing 301a, fills up coiling gap S with copper cash, shown in Figure 10 (a).In more detail, mouth of pipe (not shown) grasps the multi beam copper cash simultaneously, and the top of copper cash is wrapped in around the current electrode 310a and is fixed.This copper cash is hooked on the initial drawing opening 308 of winding of former 302, and rotating disk 401 and 402 rotations and formpiston 301 and former 302 are in engagement state.For example, rotary speed is set to 20 to 200 rev/mins.If threading speed is greater than 200 rev/mins, mould will owing to centrifugal force vibrate and may formpiston 301 and former 302 between joint fluff and performance exerted an influence.
When rotating disk 401 and 402 begins to rotate, pile up copper cash and twine copper cash in order from the inside of coiling gap S by formpiston coiling guide member 304 and former coiling guide member 306.At this moment, when vertically twining the end of mould (formpiston 301 and former 302) by the copper cash arrival of mould coiling guide member 304 windings, italic 304a is used for the bottom squeeze copper cash to coiling gap S.Therefore, be stacked to the lead that twines in the mould and be in the stratification state in the horizontal direction, shown in Figure 11 (a) in the position relative with formpiston coiling guide member 304.On the contrary, for former coiling guide member 306, italic 306a is used for being pressed downward crowded copper cash bottom coiling gap S in place, the end raising of twining mould longitudinally.Therefore, be wrapped in the copper cash that twines on the mould and except that two ends, on vertical direction, be in the stratification state, as Figure 11 (a).
If specific winding quantity for example is 10 circles, then copper cash is from twine to finish drawing opening 309 and pull out and link to each other with another current electrode terminal 310b.Figure 10 (a) and Figure 11 (a) show the just state before the extrusion action after copper cash is wound with specific winding quantity.
When the beginning copper cash twined, the terminal 310a that links to each other with copper cash winding end linked to each other with DC power supply (not shown) with 310b.For example the specific DC electric current of 150A to 250A flow to terminal 310a and 310b with the specific time from this DC power supply, for example 1.5 seconds to 3.0 seconds.Therefore, because the Joule heat of flowing through in the copper cash makes the temperature of copper cash rise, and the resin part of melting zone, be melted as the polyimides that covers copper line surface.The heating that can use formula shown below 2 to calculate copper cash.
R＝ρ×I÷A
Q＝I
2×R×t
ΔT＝Q÷(m×C)
R: coiled wire-wound coil all-in resistance, l: copper cash total length, ρ: the resistivity of copper cash, A: the total cross-sectional area of copper cash, Q: caloric value, t: supplying time, m: copper cash total amount, the thermal capacitance of C copper cash, Δ T: the temperature that copper cash rises, I: supply current
Shown in Figure 10 (b), after the fusing of the melting zone on the copper line surface, first pressurizing member 303 moves to the specific location (downward direction) on former 302 sides rapidly.When first pressurizing member 303 when downward direction moves, have width and be slightly less than the top pressure-producing part 303a of first pressurizing member 303 of the width of coiling gap S, slide on the side surface of the bossing 301a of the formpiston 301 that enters coiling gap S, and the extruding stratification is at the copper cash bundle of winding department every S inside.Be fused into melting zone because be included in each copper cash of copper cash bundle, so adjacent copper cash cooling is also carried out under the strong pressure that is produced on the first extrusion direction at first pressurizing member 303 and closely to be fixed, and fusing and sclerosis in this closely fixing state subsequently.Shown in Figure 11 (b), the copper cash bundle of stratification on the depth direction of coiling gap S is extruded at the equidirectional of carrying out the first direction of extruding with first pressurizing member 303.Figure 10 (b) shows the just state after the extruding action that first pressurizing member 303 is carried out.
When the first extrusion direction is carried out extruding, push 304 pairs of formpiston coiling guide members in the second extrusion direction at first pressurizing member 303 by second pressurizing member.Shown in Figure 11 (b), the extrusion parts 304b of formpiston coiling guide member 304, relative with the copper cash of the outset part of copper cash bundle W, described copper cash bundle is stratification and consistent with the depth direction of coiling gap S in the horizontal direction.Formpiston coiling guide member 304 is because formpiston guiding driving element 307 and be towards second direction (direction of formpiston 301) extruding copper cash bundle towards the result that the direction of formpiston 301 moves specified quantitative, and described copper cash bundle is sandwiched between bossing 301 a of extrusion parts 304b and formpiston.Be fused into melting zone because be included in each copper cash of copper cash bundle, so adjacent copper wire cooling is also carried out under the strong pressure that is produced on the second extrusion direction at second pressurizing member (formpiston coiling guide member 304) and closely to be fixed, and fusing and sclerosis in described closely fixing state subsequently.As Figure 11 (b), in the horizontal direction stratification and with the consistent copper cash bundle of depth direction of coiling gap S (formpiston coiling guide member 304) carried out extruding and is extruded at equidirectional in second direction because second pressurizing member.By on second direction, pushing the loop length of determining magnetic excitation coil.
At this, after just finishing excitation, preferably be set to 3 seconds or still less to the time that extruding move to begin.Therefore, after the coil block cooling, formpiston 301 moves up mobile from twining mould (formpiston 301 and former 302) until the magnetic excitation coil of origin position and formation.At this, cooling means can be a but method of natural wind cooling or air blast cooling, perhaps also can use additive method, as water-cooling method.Be preferably 20 seconds or more cooling time.
Owing to form the shape of the magnetic excitation coil 105 that forms by existing manufacture method along coil holding element 109, therefore coiling does not need to change shape so that the operation that is complementary with coil holding element 109, and then make that coiling is very reliable and be easy to processing, and because form coil regularly by melting zone in copper cash, even manual handle can not separated copper cash yet, and has good productivity.
Therefore, be in maximum, and the surface of heat generating roller 201 and 203 adjacent times of heating tape also are in maximum by the zone of magnetic pumping unit by the heat generating roller 201 of electromagnetic induction heating effect heating.Therefore, improved efficiency of thermal transfer.
Figure 12 is the outside drawing that shows the one type of Winder that is different from Winder shown in Fig. 6.The element identical with each parts of the Winder shown in Fig. 6 uses identical mark.
Winder shown in Fig. 6 uses such method, promptly by being placed on formpiston 301 and former 302 on the rotating disk and rotating this rotating disk subsequently, the method for twining copper cash successively from the inside of twining the mould coiling.Yet, be placed on the fixed disk and provide the mode of flywheel 401 (flyer) to construct the Winder shown in Figure 12 to twine mould.Copper cash passes the mouth of pipe 402 that is arranged on flywheel 401 tops, and then is twining wrap wire on the mould.Change in this structure although twine mould substantially, this structure can use than twining the harder material of mould, so that increase threading speed and increase productivity.
According to the manufacture method of above-mentioned magnetic excitation coil, the copper cash that electric current piles up in flowing through and winding the line, the melting zone of fusing copper cash, and form coil by the extruding action subsequently.After this, cooling coil and sclerosis fusing.Such benefit is that magnetic excitation coil has highly stable shape after forming.Even magnetic excitation coil is in uneven thickness, it is the integrated unit with a stable shape.Because coil is forced to curve curve form after extruding, so in the conventional manufacture method of magnetic excitation coil, be difficult to obtain the stable shaped of similar product of the present invention.Further, if magnetic excitation coil is in uneven thickness, also increased the unsteadiness of shape.
On the contrary, fixedly the distance between magnetic excitation coil and the heating tape (heat generating roller) also can occur Temperature Distribution heterogeneous owing to the characteristic of fixing device in heating tape.According to the manufacture method of magnetic excitation coil of the present invention, also form this mould thinly by the winding mould shape that changes high this magnetic excitation coil of location of caloric value, can be that such fixing device design even temperature distributes.
Figure 13 (a) to (e) shows the part modification example of the bossing 301a of formpiston 301.Figure 13 (b) shows the cross section of Figure 13 (a) midplane A, and Figure 13 (d) shows the cross section of Figure 13 (a) midplane B.The parts identical with the assembly of formpiston 301 shown in Fig. 9 (a) use identical mark.Former 302 identical with shown in Fig. 9 (b).
Shown in Figure 13 (a), the purpose thinner according to the thickness of these desired locations that make magnetic excitation coil is arranged on place, two desired positions with extension 301a, 301c.Although the result is the thickness of desired location to uprise with the height of extension 301a, 301c and attenuation, the width that must will be formed on the formpiston 301 of joint and the coiling gap S between the former 302 forms forr a short time.
Figure 13 (c) shows the situation that copper cash is wrapped in the formpiston 301 with extension 301a, 301c.The thickness of magnetic excitation coil after forming is being formed with in the Δ t scope of extension 301a, 301c and is becoming thinner than other zones.
On the contrary, shown in Figure 13 (d) because the position of thickness outside must the desired location of attenuation be formed on two zones having different curvature as mentioned above (C, H) in, shown in Figure 13 (e) magnetic excitation coil have homogeneous thickness and form two zones with different curvature (C, H).
In addition, use the manufacture method of the magnetic excitation coil of the formpiston 301 shown in Figure 13 (a), it is identical to flow through with above-mentioned electric current that the melting zone of the copper cash that piles up, copper cash is melted in coiling and form the method for coil by squeezing action subsequently.After this, cooling coil and make fusing sclerosis.
Figure 14 (a) to (e) shows the part modification example of the recess 302a of former 302.Figure 14 (b) shows the cross section of Figure 14 (a) midplane A and Figure 14 (d) shows the cross section of Figure 14 (a) midplane B.The parts identical with the assembly of former 302 shown in Fig. 9 (b) use identical mark.Formpiston 301 identical with shown in Fig. 9 (a).
As Figure 14 (a), the purpose thinner according to the thickness of these desired locations that make magnetic excitation coil is arranged on place, two desired positions with protruding 302c, 302d.Although the result is the thickness of desired location to uprise with the height of protruding 302c, 302d and attenuation, the width that must will be formed on the formpiston 301 of joint and the coiling gap S between the former 302 forms forr a short time.
Figure 14 (c) has the sectional view of the plane A of the magnetic excitation coil that the former 302 of protruding 302c, 302d makes for utilization.The thickness of magnetic excitation coil after forming becomes thinner than other zones that are formed with protruding 302c, 302d.
Shown in Figure 14 (d), because the position of thickness outside must the desired location of attenuation is formed on two zone (C that have different curvature as mentioned above, H) in, shown in Figure 14 (e) magnetic excitation coil have homogeneous thickness and form two zones with different curvature (C, H).
In addition, use the manufacture method of the magnetic excitation coil of the former 302 shown in Figure 13 (a), it is identical to flow through with above-mentioned electric current that the melting zone of the copper cash that piles up, copper cash is melted in coiling and form the method for coil by squeezing action subsequently.After this, cooling coil and make fusing sclerosis.
Figure 15 (a) shows an example in formpiston 301 cross sections.The projection that is arranged on the convex surfaces of formpiston 301 is made into circular arc.The projection of several circular arcs can be set.Figure 15 (b) shows an example in former 302 cross sections.The projection that is arranged on former 302 concave surfaces is made into circular arc.Structure also can be such, and promptly arc-shaped convex is connected by circular arc with the original curved part.
Although the method for partly revising die topography has been described in the above description and since the thermal radiation of end from the central row of band to the end, also have the temperature downward trend of heating tape used in the fixing device.Therefore, by the structure that continuously changes Δ t value from the center to the end is provided, the temperature of can homogeneous crossing over the whole heating element of photographic fixing assembly.
Figure 16 (a) shows the cross section of magnetic excitation wire coil unit, and the thickness with magnetic excitation coil in described unit forms thinlyyer.When (Δ t) by this way and partly formed the thickness of magnetic excitation coil thinner, the heat that produces on the fixing roller had the heating shown in Figure 16 (b) and distributes.In this mode, partly (Δ t) heat of being formed thinly regional place and producing is lowered.
Figure 17 (a) shows the cross section of the magnetic excitation wire coil unit with even magnetic excitation coil thickness.The heat that produces on the fixing roller when magnetic excitation coil thickness is even, become best (Figure 17 (b)) in the center of magnetic excitation coil.
By regulating the thickness of magnetic excitation coil by this way, the temperature of scalable heating element and then can reduce the vortex flow amount and accurately regulate heating element across whole temperature on vertically.
Therefore, when the uneven Temperature Distribution of part appears in the heating tape of fixing device, can accurately regulate the high zone of caloric value by the coiling shape of magnetic excitation coil before changing.
Although the structure of a part of coiling (formpiston 301 or former 302) alteration of form has been described in the above-described embodiments, also can use the structure of die cap (cap) change of formpiston 301 and former 302.
Although the structure of having described in the present embodiment wherein only forms the curved surface thickness of formpiston 301 and former 302 bigger, be formed to such an extent that narrowly just can use different combinations as long as twine the gap of mould.For example, can be similar to the mode of Figure 14, use several combinations of the structure that merges circular arc and straight line.
Should be noted that provides previous examples just to illustrative purposes, and these examples can not be taken as restriction of the present invention.Though described the present invention with reference to exemplary embodiment, be to be understood that at these words of having used are descriptive and illustrative words, rather than determinate words.Within the scope of the appended claims, under situation about not departing from the scope of the present invention with spirit,, can make amendment in all fields according to current described and revise.Although with reference to ad hoc structure, material and embodiment the present invention has been described, the invention is not restricted to details disclosed here at this; And the present invention extends to and uses such as all functions equivalent structure, the method that are in the claims scope.
The invention is not restricted to the foregoing description, and, variations and modifications can be arranged without departing from the scope of the invention.
The application is based on Japanese patent application No.2004-147501 that submitted on May 18th, 2004 and the Japanese patent application No.2005-65999 that submitted on March 9th, 2005, and its full content comprises incorporated by reference at this especially.
Claims (6)
1. Winder that is used to produce magnetic excitation coil comprises:
Formpiston, the shape of described formpiston is corresponding with the interior shape of described magnetic excitation coil;
Former, it can move towards described formpiston, and be set to and described formpiston between form predetermined gap, the shape of described former is corresponding with the external shape of described magnetic excitation coil; And
Controller, it is used for:
The line that will have coating surface imports described predetermined gap;
Twine described line around described formpiston;
Apply electric current to being wrapped in described formpiston line on every side;
Melt the coating surface of described coiling by Joule heat, this Joule heat produces by described coiling being applied electric current;
The described coiling that will have the coating surface that has melted between described formpiston and described former is pressed into reservation shape; And
Coiling after the cooling extrusion is so that the coiling that will cool off is fixed into described predetermined shape.
2. Winder according to claim 1 wherein is provided with extension in a plurality of positions of formpiston, so that the magnetic excitation coil of producing is thinner at the thickness of the position corresponding with a plurality of positions of described formpiston.
3. Winder according to claim 1 wherein is provided with projection in a plurality of positions of former, so that the magnetic excitation coil of producing is thinner at the thickness of the position corresponding with a plurality of positions of described former.
4. Winder according to claim 1, wherein said magnetic excitation coil are used for electrical induction type heater.
5. method of using Winder to produce magnetic excitation coil, described Winder comprises formpiston and former, the shape of described formpiston is corresponding with the interior shape of described magnetic excitation coil, and the shape of described former is corresponding with the external shape of described magnetic excitation coil, and described method comprises:
Move described formpiston towards described former;
Between described formpiston and described former, form predetermined gap;
The line that will have coating surface imports described predetermined gap;
Twine described line around described formpiston;
Apply electric current to being wrapped in described formpiston line on every side;
Melt the coating surface of described coiling by Joule heat, this Joule heat produces by described coiling being applied electric current;
The described coiling that will have the coating surface that has melted between described formpiston and described former is pressed into reservation shape; And
Coiling after the cooling extrusion is so that the coiling that will cool off is fixed into described predetermined shape.
6. method according to claim 5, wherein said magnetic excitation coil are used for electrical induction type heater.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP147501/04 | 2004-05-18 | ||
| JP2004147501 | 2004-05-18 | ||
| JP065999/05 | 2005-03-09 | ||
| JP2005065999A JP4567492B2 (en) | 2004-05-18 | 2005-03-09 | Method for manufacturing induction coil for induction heating |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100727036A Division CN100462860C (en) | 2004-05-18 | 2005-05-17 | Fixing apparatus, image forming apparatus, wire winding apparatus and method for producing magnetic excitation coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101287313A CN101287313A (en) | 2008-10-15 |
| CN101287313B true CN101287313B (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100727036A Expired - Fee Related CN100462860C (en) | 2004-05-18 | 2005-05-17 | Fixing apparatus, image forming apparatus, wire winding apparatus and method for producing magnetic excitation coil |
| CN2008100991704A Expired - Fee Related CN101287313B (en) | 2004-05-18 | 2005-05-17 | Wire winding apparatus for producing magnetic excitation coil and use method thereof |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100727036A Expired - Fee Related CN100462860C (en) | 2004-05-18 | 2005-05-17 | Fixing apparatus, image forming apparatus, wire winding apparatus and method for producing magnetic excitation coil |
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| CN (2) | CN100462860C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113611529B (en) * | 2021-04-16 | 2023-05-09 | 杭州职业技术学院 | Electromagnet coil winding device and winding method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2099368U (en) * | 1991-08-26 | 1992-03-18 | 山东龙口电工机械厂 | Wire laying device for winding machine |
| JP2001267121A (en) * | 2000-03-15 | 2001-09-28 | Saginomiya Seisakusho Inc | Molded coil and manufacturing method thereof |
| CN1349620A (en) * | 1999-03-02 | 2002-05-15 | 松下电器产业株式会社 | Image heating device and image forming device used for same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6725009B1 (en) * | 1999-10-26 | 2004-04-20 | Matsushita Electric Industrial Co., Ltd. | Image heating device and image forming apparatus using the same |
| JP3527442B2 (en) * | 1999-10-27 | 2004-05-17 | 松下電器産業株式会社 | Image heating device and image forming device |
| GB2357461B (en) * | 1999-12-22 | 2002-05-08 | Matsushita Electric Ind Co Ltd | Fixing device |
| EP1253483A4 (en) * | 2000-09-29 | 2006-06-28 | Matsushita Electric Ind Co Ltd | Image heating device and image forming device |
| JP2002123106A (en) * | 2000-10-19 | 2002-04-26 | Matsushita Electric Ind Co Ltd | Fixing device |
| CN100524082C (en) * | 2002-03-11 | 2009-08-05 | 松下电器产业株式会社 | Heating device using electromagnetic induction and fuser |
-
2005
- 2005-05-17 CN CNB2005100727036A patent/CN100462860C/en not_active Expired - Fee Related
- 2005-05-17 CN CN2008100991704A patent/CN101287313B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2099368U (en) * | 1991-08-26 | 1992-03-18 | 山东龙口电工机械厂 | Wire laying device for winding machine |
| CN1349620A (en) * | 1999-03-02 | 2002-05-15 | 松下电器产业株式会社 | Image heating device and image forming device used for same |
| JP2001267121A (en) * | 2000-03-15 | 2001-09-28 | Saginomiya Seisakusho Inc | Molded coil and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100462860C (en) | 2009-02-18 |
| CN101287313A (en) | 2008-10-15 |
| CN1700120A (en) | 2005-11-23 |
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