CN109195242A - Longitudinal wiring high-temperature electromagnetic induction heating roller - Google Patents
Longitudinal wiring high-temperature electromagnetic induction heating roller Download PDFInfo
- Publication number
- CN109195242A CN109195242A CN201811269366.3A CN201811269366A CN109195242A CN 109195242 A CN109195242 A CN 109195242A CN 201811269366 A CN201811269366 A CN 201811269366A CN 109195242 A CN109195242 A CN 109195242A
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- Prior art keywords
- heating roller
- temperature
- heating
- heating coil
- insulation pipe
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 196
- 230000005674 electromagnetic induction Effects 0.000 title claims abstract description 18
- 238000004804 winding Methods 0.000 claims abstract description 56
- 238000009413 insulation Methods 0.000 claims description 69
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 210000000988 bone and bone Anatomy 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 8
- 239000004917 carbon fiber Substances 0.000 abstract description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 8
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 238000007380 fibre production Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000007323 disproportionation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Abstract
The present invention provides a kind of longitudinal wiring high-temperature electromagnetic induction heating roller, equipped with heating roller excircle, heating roller excircle two sides are respectively equipped with heating roller left side and heating roller right side, heating roller inner chamber body is equipped with inside heating roller excircle, heats is equipped in heating roller inner chamber body, heats includes heating coil skeleton, heating coil skeleton is equipped with heating coil winding, the arranged direction of heating coil winding is to be longitudinally arranged along heating roller outer circle circumferential direction, heats runs through heating roller left side and heating roller right side, which solve the high-temperature heating devices of existing carbon fiber field, it is poor all to there is temperature uniformity in major part, temperature distribution is non-uniform, equipment is under long term high temperature running environment, service life is shorter, thermal balance also poor technical problem simultaneously.It the composite can be widely applied to the high/low temperature heating process in heating art, especially carbon fiber production process.
Description
Technical field
The present invention relates to a kind of heating devices, more particularly to a kind of longitudinal wiring high-temperature electromagnetic induction heating roller.
Background technique
In industry heating field, high-temperature heating occasion is more and more, sets especially for the high-temperature heating of carbon fiber field
Standby requirement is even more extensive, the life requirements under the long term high temperature service condition including equipment, the uniformity requirement of temperature, and heat is flat
The requirement of weighing apparatus stability is increasingly stringenter.
The high-temperature heating device of existing carbon fiber field, most of poor, temperature distributing disproportionation that all there is temperature uniformity
Even, for equipment under long term high temperature running environment, the service life is shorter, while thermal balance also poor technical problem.
Summary of the invention
The present invention is directed to the high-temperature heating device of existing carbon fiber field, and most of uniformity that all there is temperature is poor,
Temperature distribution is non-uniform, and for equipment under long term high temperature running environment, the service life is shorter, while thermal balance also ask by poor technology
Topic provides one kind under high power high-temperature operating condition, can be rapidly achieved thermal balance, and temperature uniformity is good, the carbon fiber of service life length
The high-temperature heating device in dimension field is provided in particular in a kind of longitudinal wiring high-temperature electromagnetic induction heating roller, to meet carbon fiber neck
Domain long-life, the demand of the good high-temperature heating of temperature uniformity.
For this purpose, the technical scheme is that, a kind of longitudinal wiring high-temperature electromagnetic induction heating roller is equipped with heating roller outer circle
Week, heating roller excircle two sides are respectively equipped with heating roller left side and heating roller right side, are equipped with and add inside heating roller excircle
Hot-rolling inner chamber body, is equipped with heats in heating roller inner chamber body, and heats includes heating coil skeleton, on heating coil skeleton
Equipped with heating coil winding, the arranged direction of heating coil winding is to be longitudinally arranged along heating roller outer circle circumferential direction, heats
Through heating roller left side and heating roller right side.
Preferably, heats includes main stay tube, and main stay tube is equipped with heating coil skeleton, heating coil skeleton packet
Two heat resistance insulating sheets are included, two heat resistance insulating sheets are arranged in main stay tube in certain distance, two high-temperature insulations
It is supported between plate by high-temperature insulation pipe, the axial direction of high-temperature insulation pipe and main stay tube is same direction, high-temperature insulation
Pipe formation is longitudinally arranged structure, while high-temperature insulation pipe forms circular arrangement in two heat resistance insulating sheet circumferencial directions, resistance to
It is equipped with heating coil threading hole inside high-temperature insulation pipe, is equipped with inside the heating coil threading hole being equipped with inside high-temperature insulation pipe
Heating coil winding.
Preferably, high temperature resistant support plate is additionally provided between two heat resistance insulating sheets, high temperature resistant support plate is equipped with resistance to height
Warm insulation tube supported hole, high-temperature insulation pipe pass through high-temperature insulation pipe supported hole, and high-temperature insulation pipe supported hole supports resistance to height
Warm insulation tube.
Preferably, internal thermal equilibrium area is formed between heat resistance insulating sheet and high temperature resistant support plate, in high temperature resistant support plate
Equipped with heat exchange hole, heat release hole is equipped among main stay tube, heat release hole runs through main stay tube overall length direction, shape among main stay tube
At hollow structure, the tube wall of main stay tube is equipped with gas vent.
Preferably, in heat resistance insulating sheet side and heating roller right side inside and heating roller left side inside are respectively equipped with
Thermal balance area of portion, heating roller left side and heating roller right side are equipped with gas vent, and heat resistance insulating sheet is equipped with heat exchange hole.
Preferably, the high-temperature insulation pipe supported hole that high temperature resistant support plate is equipped with is 4-8 group, 4-8 group in circumferencial direction
High-temperature insulation pipe supported hole forms 4-8 group heating coil winding element, and 4-8 group heating coil winding element forms whole add
Heat coil winding, opposite direction moves towards the winding run for the two groups of heating coil winding elements that are often connected each other.
Preferably, the distance between connected high-temperature insulation pipe of heating coil winding element is 5-10mm.
Preferably, the excircle of high-temperature insulation pipe is 3-5mm at a distance from heating roller excircle inner wall.
Preferably, heating roller excircle is rotatably connected with respect to heats.
The invention has the advantages that main stay tube is equipped with heating coil bone since heats includes main stay tube
Frame, heating coil skeleton include two heat resistance insulating sheets, and two heat resistance insulating sheets are arranged in main stay tube in certain distance
On, it is supported between two heat resistance insulating sheets by high-temperature insulation pipe, the axial direction of high-temperature insulation pipe and main stay tube is same
One direction, the formation of high-temperature insulation pipe is longitudinally arranged structure, while high-temperature insulation pipe is two heat resistance insulating sheet circumference sides
To circular arrangement is formed, heating coil threading hole, the heating being equipped with inside high-temperature insulation pipe are equipped with inside high-temperature insulation pipe
Heating coil winding is equipped with inside coil threading hole, this longitudinal wiring high-temperature electromagnetic induction heating roller can satisfy carbon fiber
Field long-life, the demand of the good high-temperature heating of temperature uniformity.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is heats structural schematic diagram of the present invention；
Fig. 3 is heating coil winding end face arrangement schematic diagram；
Fig. 4 is heating coil winding element end face arrangement schematic diagram；
Fig. 5 is heat resistance insulating sheet end view；
Fig. 6 is high temperature resistant support plate end view；
Fig. 7 is high-temperature insulation pipe cross-sectional view.
Symbol description in figure:
1. heats；2. heating roller excircle；3. heating roller right side；4. heating roller inner chamber body；5. heating roller left end
Face；6. heating roller rotation support；7. heating coil winding；8. heating coil skeleton；101. bearing；102. main stay tube；103.
Heat resistance insulating sheet；104. high temperature resistant support plate；105. high-temperature insulation pipe；106. connecting flange；107. gas vent；108. dissipating
Hot hole；109. high-temperature insulation pipe supported hole；110. heat exchange hole；111. internal thermal equilibrium area；112. heating coil winding list
Member；113. heating coil end of incoming cables；114. heating coil leading-out terminal；115. heating coil threading hole.
Specific embodiment
The present invention is described further below with reference to embodiment.
Fig. 1-7 is a kind of embodiment of the invention, a kind of longitudinal wiring high-temperature electromagnetic induction heating roller, can be seen in Fig. 1
Out, this is longitudinally routed high-temperature electromagnetic induction heating roller and is equipped with heating roller excircle 2, and 2 two sides of heating roller excircle, which are respectively equipped with, to be added
Hot-rolling left side 5 and heating roller right side 3, are equipped with heating roller inner chamber body 4 inside heating roller excircle 2, in heating roller inner chamber body 4
Equipped with heats 1, heats 1 includes heating coil skeleton 8, and heating coil skeleton 8 is equipped with heating coil winding 7, adds
The arranged direction of heat coil winding 7 is to be longitudinally arranged along 2 direction of heating roller excircle, that is to say, that the line of heating coil winding 7
It encloses winding and arranges that each coil is arranged into another in the initial end of heats 1 along the axis direction of heating roller excircle 2
Behind end, it is arranged into the initial end of heats 1 after reverse directions along the axis direction of heating roller excircle 2 again, turns round again
Side is arranged into the other end back along the axis direction of heating roller excircle 2, and such coil arrangement is until by heats 1
Circumferential directions are full, then draw heating coil end of incoming cables 113 and heating coil leading-out terminal 114, can after powering on
To realize the electromagnetic heating of coil, due to heating coil winding 7 coil windings along heating roller excircle 2 axis direction cloth
It sets, in this way during electromagnetic heating, the magnetic line of force is very equal in the heating vortex that the wall thickness position of heating roller excircle 2 generates
Even, heating is also just highly uniform, and the consistency of temperature is good；Heats 1 runs through heating roller left side 5 and heating roller right side 3,
Heating roller left side 5 and heating roller right side 3 are respectively equipped with heating roller rotation support 6, can make the heating of 1 outside of heats
Roller excircle 2 realizes spinning movement, facilitates the applications of rotary heating.
It can be seen that, heats 1 includes main stay tube 102 in Fig. 2, and main stay tube 102 is equipped with heating coil skeleton
8, heating coil skeleton 8 includes two heat resistance insulating sheets 103, and two heat resistance insulating sheets 103 are arranged in master in certain distance
It on support tube 102, can be connected by connecting flange 106, the two sides of main stay tube 102 are respectively equipped with bearing 101, can hold
Heating roller excircle 2 realizes rotation function, is supported between two heat resistance insulating sheets 103 by high-temperature insulation pipe 105, resistance to height
The axial direction of warm insulation tube 105 and main stay tube 102 is same direction, and the formation of high-temperature insulation pipe 105 is longitudinally arranged structure, simultaneously
High-temperature insulation pipe 105 is inside two 103 circumferencial directions of heat resistance insulating sheet formation circular arrangements, high-temperature insulation pipe 105
Equipped with heating coil threading hole 115, heating is equipped with inside the heating coil threading hole 115 that is equipped with inside high-temperature insulation pipe 105
Coil windings 7；Since the axial direction of high-temperature insulation pipe 105 and main stay tube 102 is same direction, electromagnetic eddy can be optimized
Heating uniformity, simultaneously as being equipped with heater wire inside the heating coil threading hole 115 being equipped with inside high-temperature insulation pipe 105
Winding 7 is enclosed, 105 material of high-temperature insulation pipe generally selects the insulating materials such as micarex, these insulation high-temperature-resistant materials all have
Certain rigidity, during heating, when being especially heated at high temperature, the available high-temperature insulation pipe 105 of heating coil winding 7
Smooth support, heating coil winding 7 telescopic variation will not influence heating coil winding 7 and heating roller excircle
2 distance can guarantee stable distribution of the electromagnetic eddy in heating roller excircle 2 again in this way, form the hair of stable and uniform
Thermal effect.
It can further be seen that being additionally provided with high temperature resistant support plate 104, high temperature resistant branch between two heat resistance insulating sheets 103 in Fig. 2
Fagging 104 is equipped with high-temperature insulation pipe supported hole 109, and high-temperature insulation pipe 105 passes through high-temperature insulation pipe supported hole 109,
High-temperature insulation pipe supported hole 109 supports high-temperature insulation pipe 105.The support of such heat resistance insulating sheet 103, in turn ensures
The rigidity of high-temperature insulation pipe 105, especially under ultra-high temperature condition, the slight deformation of high-temperature insulation pipe 105 can also obtain resistance to
The support of high-temperature support plate 104, will not deformation occurs, guarantee heating coil winding 7 stability.Generally according to heats 1
Length it is different, multiple high temperature resistant support plates 104 are set, have reached stable support effect, while heating coil winding 7 being led to
Cross the arrangement of high-temperature insulation pipe 105, it is possible to reduce a possibility that heating coil winding 7 is short-circuit, even if heating coil winding 7 occurs
The problem of aging, also can realize the effect of insulation inside high-temperature insulation pipe 105, will not be short-circuit, increase the longevity of equipment
Life, improves reliability.
It is put down simultaneously in figure 2 it can be seen that forming internal heat between heat resistance insulating sheet 103 and high temperature resistant support plate 104
Weigh area 111, and high temperature resistant support plate 104 is equipped with heat exchange hole 110, is equipped with heat release hole 108, heat release hole among main stay tube 102
108 run through 102 overall length direction of main stay tube, form hollow structure among main stay tube 102, set on the tube wall of main stay tube 102
There is gas vent 107.
Due to the presence of heat exchange hole 110 and heat release hole 108, when the temperature of internal air is variant, hot-air can
To realize thermal balance automatically by heat exchange hole 110 and heat release hole 108, so that internal thermal equilibrium area 111 is in thermal equilibrium state, subtract
Less and eliminate for heating roller excircle 2 temperature influence.
Inside is respectively equipped on the inside of 103 side of heat resistance insulating sheet and 3 inside of heating roller right side and heating roller left side 5
Thermal balance area 111, heating roller left side 5 and heating roller right side 3 are equipped with gas vent 107, and heat resistance insulating sheet 103 is equipped with
Heat exchange hole 110 when the temperature in internal thermal equilibrium area 111 is very high, can pass through heating roller left side 5 and heating roller right side
3 gas vents 107 being equipped with are discharged, with the influence of the improper high temperature inside alleviation.
It is detailed to explain heating coil winding end face arrangement schematic diagram and heating coil winding element end in Fig. 3 and Fig. 4
Face arrangement schematic diagram, in design, the high-temperature insulation pipe supported hole 109 that high temperature resistant support plate 104 is equipped with is in circumferencial direction
It can be 4-8 group, 4-8 group high-temperature insulation pipe supported hole 109 forms 4-8 group heating coil winding element 112, the heating of 4-8 group
Coil windings unit 112 forms whole heating coil winding 7, and the winding for the two groups of heating coil winding elements 112 that are often connected is walked
Opposite direction moves towards line each other, and heating coil winding element 112 uses 8 groups in the figure of the embodiment, each is given in Fig. 3 and is added
The wiring of the coil of heat coil winding element 112 is moved towards, also, it is clear that the bullet symbol in figure indicates in Fig. 4
Coil is arranged across paper direction, and the cross symbol in figure then indicates that coil is arranged across paper direction, in this way can be very clear
Opposite direction moves towards the clear winding run for seeing the two groups of heating coil winding elements 112 that are often connected each other, such benefit be
In the region of the corresponding heating roller excircle 2 of the same heating coil winding element 112, the direction of current vortex is consistent, and heating is steady
It is qualitative good.
When design, the distance between connected high-temperature insulation pipe 105 of heating coil winding element 112 is 5-10mm, this
Sample can avoid the electromagnetism of each group of heating coil winding element 112 again between connected heating coil winding element 112
Interfere with each other, guarantee heating coil winding element 112 magnetic field between independence, mutual disturbance will not be generated, for
The temperature of heating guarantees that uniformly the service life used is long.The excircle of high-temperature insulation pipe 105 and 2 inner wall of heating roller excircle
Distance is 3-5mm, the thermal efficiency highest that heating coil winding element 112 can be made to generate in heating roller excircle 2.
When design, heating roller excircle 2 is rotatably connected with respect to heats 1, can satisfy various rotary heatings
Occasion uses.
In the above-mentioned technical solution, the technical characteristic of any equivalent replacement belongs to protection scope of the present invention,
This is not repeated one by one.
Claims (9)
1. a kind of longitudinal wiring high-temperature electromagnetic induction heating roller, is equipped with heating roller excircle, characterized in that the heating roller outer circle
All two sides are respectively equipped with heating roller left side and heating roller right side, are equipped with heating roller inner cavity inside the heating roller excircle
Body is equipped with heats in the heating roller inner chamber body, and the heats includes heating coil skeleton, the heating coil bone
Frame is equipped with heating coil winding, and the arranged direction of the heating coil winding is to be longitudinally arranged along heating roller outer circle circumferential direction,
The heats runs through heating roller left side and heating roller right side.
2. longitudinal wiring high-temperature electromagnetic induction heating roller according to claim 1, which is characterized in that the heats packet
Main stay tube is included, the main stay tube is equipped with heating coil skeleton, and the heating coil skeleton includes two high-temperature insulations
Plate, described two heat resistance insulating sheets are arranged in main stay tube in certain distance, are led between described two heat resistance insulating sheets
It crosses high-temperature insulation pipe to support, the axial direction of the high-temperature insulation pipe and main stay tube is same direction, the high-temperature insulation
Pipe formation is longitudinally arranged structure, while the high-temperature insulation pipe forms round cloth in two heat resistance insulating sheet circumferencial directions
It sets, heating coil threading hole, the heating coil being equipped with inside the high-temperature insulation pipe is equipped with inside the high-temperature insulation pipe
Heating coil winding is equipped with inside threading hole.
3. longitudinal wiring high-temperature electromagnetic induction heating roller according to claim 2, which is characterized in that described two high temperature resistants
High temperature resistant support plate is additionally provided between insulation board, the high temperature resistant support plate is equipped with high-temperature insulation pipe supported hole, described resistance to
High-temperature insulation pipe passes through high-temperature insulation pipe supported hole, and the high-temperature insulation pipe supported hole supports high-temperature insulation pipe.
4. longitudinal wiring high-temperature electromagnetic induction heating roller according to claim 3, which is characterized in that the high-temperature insulation
Internal thermal equilibrium area is formed between plate and high temperature resistant support plate, the high temperature resistant support plate is equipped with heat exchange hole, the main branch
Heat release hole is equipped among stay tube, the heat release hole runs through main stay tube overall length direction, forms hollow knot among the main stay tube
The tube wall of structure, the main stay tube is equipped with gas vent.
5. longitudinal wiring high-temperature electromagnetic induction heating roller according to claim 3, which is characterized in that the high-temperature insulation
Internal thermal equilibrium area, the heating roller left end are respectively equipped on the inside of plate side and heating roller right side and on the inside of heating roller left side
Face and heating roller right side are equipped with gas vent, and the heat resistance insulating sheet is equipped with heat exchange hole.
6. longitudinal wiring high-temperature electromagnetic induction heating roller according to claim 2, which is characterized in that the high temperature resistant support
The high-temperature insulation pipe supported hole that plate is equipped with is 4-8 group in circumferencial direction, and the 4-8 group high-temperature insulation pipe supported hole is formed
4-8 group heating coil winding element, the 4-8 group heating coil winding element form whole heating coil winding, are often connected
Opposite direction moves towards the winding run of two groups of heating coil winding elements each other.
7. longitudinal wiring high-temperature electromagnetic induction heating roller according to claim 2, which is characterized in that the heating coil around
Connected the distance between the high-temperature insulation pipe of group unit is 5-10mm.
8. longitudinal wiring high-temperature electromagnetic induction heating roller according to claim 2, which is characterized in that the high-temperature insulation
The excircle of pipe is 3-5mm at a distance from heating roller excircle inner wall.
9. longitudinal wiring high-temperature electromagnetic induction heating roller according to claim 1, which is characterized in that the heating roller outer circle
Week, opposite heats was rotatably connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811269366.3A CN109195242A (en) | 2018-10-29 | 2018-10-29 | Longitudinal wiring high-temperature electromagnetic induction heating roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811269366.3A CN109195242A (en) | 2018-10-29 | 2018-10-29 | Longitudinal wiring high-temperature electromagnetic induction heating roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109195242A true CN109195242A (en) | 2019-01-11 |
Family
ID=64944293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811269366.3A Pending CN109195242A (en) | 2018-10-29 | 2018-10-29 | Longitudinal wiring high-temperature electromagnetic induction heating roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109195242A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6252212B1 (en) * | 1999-12-28 | 2001-06-26 | Toshiba Tec Kabushiki Kaisha | Image fixing apparatus with induction heating device and manufacturing method thereof |
| WO2004008257A1 (en) * | 2002-07-11 | 2004-01-22 | Matsushita Electric Industrial Co., Ltd. | Image fixing device with an induction coil around a heating roller |
| CN103096552A (en) * | 2013-01-15 | 2013-05-08 | 石家庄纺织机械有限责任公司 | Electromagnetic induction heating roll |
| CN108463017A (en) * | 2018-04-25 | 2018-08-28 | 威海纳百川新材料科技有限公司 | A kind of high-temperature electromagnetic induction heating apparatus |
| CN209497626U (en) * | 2018-10-29 | 2019-10-15 | 威海达明新材料科技有限公司 | A kind of longitudinal wiring high-temperature electromagnetic induction heating roller |
-
2018
- 2018-10-29 CN CN201811269366.3A patent/CN109195242A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6252212B1 (en) * | 1999-12-28 | 2001-06-26 | Toshiba Tec Kabushiki Kaisha | Image fixing apparatus with induction heating device and manufacturing method thereof |
| WO2004008257A1 (en) * | 2002-07-11 | 2004-01-22 | Matsushita Electric Industrial Co., Ltd. | Image fixing device with an induction coil around a heating roller |
| CN103096552A (en) * | 2013-01-15 | 2013-05-08 | 石家庄纺织机械有限责任公司 | Electromagnetic induction heating roll |
| CN108463017A (en) * | 2018-04-25 | 2018-08-28 | 威海纳百川新材料科技有限公司 | A kind of high-temperature electromagnetic induction heating apparatus |
| CN209497626U (en) * | 2018-10-29 | 2019-10-15 | 威海达明新材料科技有限公司 | A kind of longitudinal wiring high-temperature electromagnetic induction heating roller |
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Application publication date: 20190111 |
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| WD01 | Invention patent application deemed withdrawn after publication |