CN102932978A - A dipping heater - Google Patents
A dipping heater Download PDFInfo
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- CN102932978A CN102932978A CN 201110333693 CN201110333693A CN102932978A CN 102932978 A CN102932978 A CN 102932978A CN 201110333693 CN201110333693 CN 201110333693 CN 201110333693 A CN201110333693 A CN 201110333693A CN 102932978 A CN102932978 A CN 102932978A
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- heater
- outer bobbin
- impregnated
- heating wire
- coil
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- 238000007598 dipping method Methods 0.000 title abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 87
- 239000000919 ceramic Substances 0.000 claims abstract description 15
- 238000005485 electric heating Methods 0.000 abstract description 19
- 229910052751 metal Inorganic materials 0.000 description 43
- 239000002184 metal Substances 0.000 description 43
- 238000009413 insulation Methods 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 239000004411 aluminium Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- 229910052571 earthenware Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229910001120 nichrome Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- YXTPWUNVHCYOSP-UHFFFAOYSA-N bis($l^{2}-silanylidene)molybdenum Chemical compound [Si]=[Mo]=[Si] YXTPWUNVHCYOSP-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000000981 epithelium Anatomy 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910021343 molybdenum disilicide Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The invention provides a dipping heater which has high effective output, small size, and easy manipulation and which is especially suitable for being used as an auxiliary heater. The dipping heater comprises a bottom-containing outer bobbin made of insulating ceramic and coil electric heating line arranged in the outer bobbin. The dipping heater is characterized in that the inner face of the heating portion of the outer bobbin is equipped with a cone where the inner diameter of opening side of the heating portion is more than that of the bottom side of the heating portion. And the coil electric heating line is in a shape connecting the coil side with the inner face of the heating portion of the outer bobbin at least when the coil emits heat. And the coil side is supported by the inner face.
Description
Technical field
The present invention relates to a kind of molten metal impregnated heater that in the nonferrous metal liquations such as aluminium, zinc motlten metal is heated of putting into, relate in particular to a kind of small-sized molten metal impregnated heater that can be suitable as the use of auxiliary heating source.
Background technology
Be used for the nonferrous metal liquation that the nonferrous metal liquations such as aluminium and zinc heat maintenance kept stove motlten metal in stove to possess heater is equipped on the impregnated heater in the refractory material protection tube processed (outer bobbin) such as pottery.
The usually reaction of heated heater and motlten metal and completely cut off with motlten metal and consisted of by the earthenware with high-insulativity in order to prevent from utilizing the energising heating of this impregnated heater.In the past, known have an aluminium motlten metal impregnated heater that contains heater in the thermal endurance insulating part materials such as silicon nitride.The known heater that is contained in the earthenware is the heater of the various shapes of heater air flow pressure switch rod, U font heater, spiral or coiled type heater and so on.Can use the various materials such as metallic heating body of silicon carbide, nichrome wire and molybdenum disilicide and so on as the heater raw material.
As such impregnated heater, known have with top dangle the loam cake that is supported on molten metal container and with its underpart impregnated in the straight tube shape heater that uses in the motlten metal, the sidewall of the molten metal container that connects described maintenance stove and near the end in the container and level frame if the heater of usefulness etc.Such impregnated heater consists of a part that keeps stove.
These impregnated heaters require that as thermal source larger electric capacity is arranged, and consequently, need to adopt impregnated heater and the large power supply of larger size.The capacity of impregnated heater has very high dependence to size and the thermal insulation of the body of heater of maintenance motlten metal.
That is, the body of heater that thermal insulation is poor, thermal capacity is large then needs jumbo heater.In recent years, improving the thermal insulation of body of heater self, also diminishing as the heater capacity of necessity, expectation has small-sized and easy-operating impregnated heater.
On the other hand, within keeping stove and electroplating bath etc., in order to replenish the drop in temperature because of the motlten metal that causes from the heat radiation that drains out the peristomes such as mouth, wish to have in the part to the assistant soakage formula heater of molten metal heating, insulation.
As small-sized and easy to operate, the preferably just easy mobile small-sized and high output of heater of impregnated heater especially for auxiliary heating in addition, does not need large transformer as power supply, requires easily wiring.In addition, importantly as required can flexible corresponding output and shape and providing at an easy rate.
About power supply, preferably in the common power of 100V or 200V, do not use special transformer etc., can for example only export control with shutter.The common metal electric heating wire rod of nichrome wire and ferrum-chromium-aluminum heat-resisting alloy line and so on is rolled into coiled type and it is contained in constructor in the insulating ceramics pipe close and state purpose.
In this impregnated heater, the electric heating wire rod is rolled into coil is contained in the pipe, still, owing to the thermal endurance of electric heating wire rod self, the restriction of non-oxidizability, therefore, if the excessive temperature of electric heating wire rod self rises, then the heater life-span is extremely short.Therefore, HEATER FOR MEASURING internal temperature in this impregnated heater is controlled electric load in the mode that is no more than allowable temperature.Thereby, if the heat that the electric heating wire rod produces can not be transmitted to motlten metal effectively, in the actual environment for use of then can only loading much smaller than the output of the design output capacity of calculating according to total resistance value and the peak load potentiometer of electric heating wire rod.After, will be designated as at the output capacity that this actual environment can be loaded " effectively output ".Existing known this impregnated heater can't fully adapt to small-sized and effectively be output as high this requirement of output.
As this impregnated heater, for example patent documentation 1 has proposed a kind of impregnated heater of heater being buried and is contained in underground high heat conductivity powder in the thermal endurance earthenware.Metallic sheath type heater can be made of identical method, and in the metallic sheath type, in metallic sheath after the powder of filling heating wire and high thermal conductivity, metallic sheath is dwindled, filling is made the densification state in powder wherein, realize that the heat of raising heating wire generation moves the purpose of (heat conduction efficiency) to the heat of heating object.
In addition, patent documentation 2 has proposed a kind of outer bobbin and has been formed by the conductivity ceramic material of radiation efficiency excellence, make in the heat that produces because of the outer bobbin that urceolus self energising generate heat and directly dispel the heat to molten metal, the impregnated heater that this molten metal is effectively heated or is incubated.
Patent documentation 1: Japanese kokai publication hei 11-176564 communique
Patent documentation 2: TOHKEMY 2008-269808 communique
But, in patent documentation 1 described impregnated heater, be the pottery system owing to be equivalent to the pipe of sheath, thereby can't underground the powder densification of heater will be buried, powder layer exists containing under the state of many pores, because instead particle size and pack completeness make powder layer play a role as insulation material sometimes, be difficult to realize improving the purpose of heat conduction efficiency.In addition, in patent documentation 2 described impregnated heaters, do not have conductivity and to the high ceramic material of molten metal solution corrosion resistance, in addition, because motlten metal also has conductivity, thereby electric shock accidents easily occurs, do not have actuality.
Summary of the invention
The present invention is in order to adapt to above-mentioned requirements, and to provide a kind of small-sized and easy to operate, the impregnated heater that especially is suitable as auxiliary heater is problem.
In addition, problem of the present invention is, the high small-sized impregnated heater of effective output of the stable operation of a kind of manufacturing that helps the non-iron casting parts such as aluminium and zinc and plating is provided at an easy rate.
Shape and the heating wire coil holding method of to outer bobbin in accommodating of present inventor by being conceived to insulating ceramics outer bobbin processed (following sometimes also referred to as " outer bobbin ") and coiled type heating wire (following sometimes also referred to as " heating wire coil ") solved described problem of the present invention.Namely, the invention provides a kind of impregnated heater, it comprises the coiled type heating wire that insulating ceramics is shaped with end outer bobbin and is contained in this outer bobbin, it is characterized in that, the internal face of the heating part of described outer bobbin has the peristome side internal diameter of this heating part greater than the taper of bottom side internal diameter, and described coiled type heating wire has the shape that its coil sides is joined at the internal face of the heating part of adstante febre and described outer bobbin at least, and is supported by this inwall.
According to the present invention, can provide a kind of small-sized and easy to operate, especially be suitable as the impregnated heater of auxiliary heater.
In addition, according to the present invention, can provide at an easy rate the high impregnated heater of effective output of the stable operation of a kind of manufacturing that helps the non-iron casting parts such as aluminium and zinc and plating.
Description of drawings
Fig. 1 is the summary section of one of expression impregnated heater of the present invention example;
Fig. 2 is the curve chart of the relation of effective output of expression impregnated heater and heater internal temperature.
Symbol description
A: insulating ceramics is shaped with end outer bobbin, b: lead-in wire, c: thermocouple, d: heating wire coil, e: holding clamp, f: terminal box, α: the formed angle of central axis direction vertical line of the internal face of insulating ceramics outer bobbin and outer bobbin, β: leading part, γ: heating part.
Embodiment
Existing impregnated heater is the shape that contains the heating wire coil in the insulating ceramics straight tube, but, because the coefficient of thermal expansion of the metal electric heating wire rod of heating wire coil is larger than the coefficient of thermal expansion of the pottery that consists of outer bobbin, thereby need to consider the poor of this coefficient of thermal expansion, make the external diameter of heating wire coil less than the internal diameter of outer bobbin.In addition, because the heating wire coil easily deforms under the high temperature, thereby, to be useful on the supporting insulating part of hold-in winding shape and prevent the separator of coil short in the outer bobbin domestic demand, in addition, because the internal diameter of outer bobbin and the external diameter of heating wire coil easily produce error during fabrication, thereby, in order at an easy rate the heating wire coil to be contained in outer bobbin, and the external diameter with the heating wire coil of having to is designed to the internal diameter decimal millimeter～tens of millimeters than outer bobbin.The heat that produces in the electric heating wire rod of heating wire coil is transmitted in the molten metal via outer bobbin, in this situation, thinks that the gap (air layer) that forms between heating wire coil and the outer bobbin stops the heat conduction, reduces heat conduction efficiency.
The trial-production that the present inventors have carried out making as far as possible the gap between the internal face of heating wire coil and outer bobbin to become narrow repeatedly, it is effective to improving heat conduction efficiency to have confirmed to reduce this gap.But, in order to reduce gap between heating wire coil and the outer bobbin inwall to improve heat conduction efficiency, need to have the pottery processing of height and the coil of high-precision electric heating wire rod to process, thereby cause cost significantly to rise.Therefore, the present inventors are studied the as far as possible little method in this gap to not needing processing highly, have realized the present invention.
Namely, the present invention relates to a kind of impregnated heater, it comprises the coiled type heating wire that insulating ceramics is shaped with end outer bobbin and is contained in this outer bobbin, it is characterized in that, the internal face of the heating part of described outer bobbin has the peristome side internal diameter of this heating part greater than the taper of bottom side internal diameter, and described coiled type heating wire has the shape that its coil sides is joined at the internal face of the heating part of adstante febre and described outer bobbin at least, and is supported by this inwall.
Namely, the internal face of heating part of accommodating the outer bobbin of heating wire coil made the peristome side internal diameter that makes this heating part greater than the taper of bottom side internal diameter, and the profile of heating wire coil is made the taper of the form that the internal face with the heating part of outer bobbin joins, thus, can absorb the deviation that the outer bobbin internal diameter is made, internal face and the heating wire coil of outer bobbin setting can be connected airtight, and the supporting of the circular cone realization heating wire coil of outer bobbin inwall can be utilized.Thus, by making the heating wire coil up and down and the difference of the coefficient of thermal expansion of the metal electric heating wire rod of heating wire coil and outer bobbin is absorbed along the coniform internal face of this outer bobbin.
As long as impregnated heater of the present invention joins the taper seat of heating wire coil sides and outer bobbin heating part inwall." coil sides " of heating wire coil refers to form the exterior side surface that the metal electric heating wire rod of the heating wire coil of circular cone roughly or truncated cone shape consists of, " internal face of the heating part of coil sides and described outer bobbin is joined " to refer to have at least at adstante febre the taper that the taper seat of the heating part inwall of exterior side surface that the metal electric heating wire rod by described heating wire coil forms and outer bobbin is joined.Such exterior side surface has the heating wire coil of taper, for example can be easy to make by winding metal wire on the tube core that has with the coning angle equal angular of the inwall of the heating part of outer bobbin.In addition, " joining at adstante febre at least " refers to need only and joins at adstante febre, and the state beyond the adstante febre is not particularly limited.Move up and down along the coniform internal face of outer bobbin if consider adstante febre heating wire coil, then the heating wire coil beyond adstante febre also can with local contact of internal face of the heating part of outer bobbin.
Fig. 1 is the summary section of an example of expression impregnated heater of the present invention.Utilize Fig. 1 to describe an example of impregnated heater of the present invention in detail.
Impregnated heater of the present invention contains the heating wire heater in insulating ceramics outer bobbin a processed in the end is arranged, it contains heating part γ that heater is heating wire coil d and top by the bottom and contains to the leading part β of the lead-in wire b of heating wire coil d power supply and consist of.The impregnated heater is arranged at the upper end of heating part γ the position more than the metal bath surface downside 20mm of motlten metal, and heating part γ thorough impregnation is used in the nonferrous metal liquation.Expect the impregnated heater is vertically arranged in order stably to support the heating wire coil.But also can with about 45 degree or the following angle of 45 degree be obliquely installed.
In heating part γ, make the internal diameter of open side (top) of insulating ceramics outer bobbin processed greater than the taper of the internal diameter of bottom side (bottom).Taper can be according to the internal diameter of the impregnated heater that will make and the length setting best angle of heating part γ.In the present invention, can make the little side's of cone angle (the center vertical line of insulating ceramics outer bobbin processed and the formed angle [alpha] of internal face 2 times) the leading part diameter of impregnated heater little, can be made into small-sized as heater, but, in little cone angle alpha of spending to less than 1.0, to cause the difference of internal diameter of the external diameter of coiled type heating wire upper end and lower end little, and not support the effect of coil, thus not preferred.Although the size of cone angle 2 α is without limits,, if the excessive diameter that then causes leading part β becomes large and loses small-sized property, in addition, owing to make from scattering of the heat of leading part β violently, thereby only just limit the coning angles that surpass 5 degree in very special occasion.In the present invention, preferred cone angle 2 α are 1.0 degree～5.0 degree, more preferably 1.0 degree～3.0 degree.The earthenware shape of leading part β also can be made the prolongation of the conical tube of heating part γ, in order to make the impregnated heater small-sized, preferably leading part is made the straight tube shape of the diameter that can be easy to insert the heater coil.
As the high insulating ceramics of insulation resistance under the high temperature, can adopt not only to have high strength under the high temperature, high rigidity, highly corrosion resistant, and at high temperature show good heat conductivity, at high temperature also show in addition the pottery of good electrical insulating property.In the present invention, such as using silicon nitride and sialon, boron nitride etc. and their composite ceramics.Silicon nitride particularly, even reach high temperature more than 800 ℃, the decline of its insulation resistance is little, and not only to the excellent corrosion resistance of the nonferrous metal liquations such as aluminium and zinc, and resistance to sudden heating is good, thereby can preferably use.
Heater is that the electric heating wire rod of heating wire coil can use the nichrome wire of market sale and Aludirome line etc., in addition, and the preferred electric heating wire rod that uses the surface to be formed with the insulating properties epithelium.In addition, also can after the electric heating wire rod is wound into coiled type, implement insulation-coated.
If the heating wire coil is applied load excessively, then the excessive temperature of electric heating wire rod rises, and causes its lifetime.Be anti-here situation, preferably the heating part in impregnated heater inside arranges thermocouple c and exports with control heater.
Embodiment
Below, specify the present invention by embodiment.
Embodiment 1～3, comparative example 1,2
Under 200V, use the electric heating wire rod of 8KW capacity, make the heating wire coil of shape as shown in table 1.Article are also made the common coil of non-circular cone as a comparison.For guaranteeing the insulation between each circle, after being wound into coil, carried out insulation processing with the agent of alumina series insulation processing.
Making makes the heating part that contains the heating wire coil have the silicon nitride tubulation of the cone angle identical with the heating wire coil, accommodate described heating wire coil, in addition, for the internal temperature of instrumentation impregnated heater thermocouple is placed the center of impregnated heater heating part.
Use the crucible furnace melting aluminum metal 140kg of gas burner heated type, the impregnated heater of making is placed motlten metal.Making molten metal temperature by gas burner is 700 ℃, makes motlten metal integral body after temperature reaches poised state, stops the gas burner heating, switches on to the impregnated heater.The temperature of indicating thermocouple of the inside that is arranged at the impregnated heater and the relation of heater output have been investigated.Article of the present invention 1～3 shown in the his-and-hers watches 1 are that 3 of conical impregnated heaters (embodiment 1～3) are that 2 of straight pipe type impregnated heaters (comparative example 1,2) have carried out identical test with comparative item 1,2.Its result such as Fig. 2.The comparison that table 1 expression makes each key element of the impregnated heater of testing and the volume of each dip pipe in motlten metal and the heater output when reaching 1050 ℃ of the heat transfer area of joining with motlten metal and the impregnated heater internal temperature under 700 ℃ of environment of molten metal temperature is carried out.
Table 1
According to Fig. 2 and table 1 as can be known, impregnated heater of the present invention (embodiment 1～3) is compared with dipping volume and motlten metal contact area comparative example 1 (straight pipe type impregnated heater) about equally in motlten metal, the effective output of raising more than 20% of can loading.Comparative example 1 becomes the factors of comparative example 2 usually for by implementing highly to process the impregnated heater of making.Comparative example 2 and embodiment 1～3 are compared, and not only the volume of article of the present invention is little, namely small-sized as can be known, and output improves the effective output more than 50%.
Utilizability on the industry
Impregnated heater of the present invention can as putting into the molten metal impregnated heater that in the nonferrous metal liquations such as aluminium, zinc motlten metal is heated, particularly because effectively output is high, small-sized and easy to operate, thereby can be suitable as auxiliary heater.
Claims (2)
1. impregnated heater, it comprises the coiled type heating wire that insulating ceramics is shaped with end outer bobbin and is contained in this outer bobbin, it is characterized in that,
The internal face of the heating part of described outer bobbin has the peristome side internal diameter of this heating part greater than the taper of bottom side internal diameter, and, described coiled type heating wire has the shape that its coil sides is joined at the internal face of the heating part of adstante febre and described outer bobbin at least, and is supported by this inwall.
2. impregnated heater as claimed in claim 1, wherein,
Described insulating ceramics be shaped with end outer bobbin heating part internal face cone angle (2 α) 1.0～5.0 the degree scopes in.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011174835A JP4914945B1 (en) | 2011-08-10 | 2011-08-10 | Immersion heater |
| JP2011-174835 | 2011-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102932978A true CN102932978A (en) | 2013-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110333693 Pending CN102932978A (en) | 2011-08-10 | 2011-10-28 | A dipping heater |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4914945B1 (en) |
| CN (1) | CN102932978A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104080215A (en) * | 2014-07-02 | 2014-10-01 | 昆山特丰机电设备有限公司 | Non-ferrous metal solution heating bar |
| CN104690262A (en) * | 2013-12-03 | 2015-06-10 | 三井金属矿业株式会社 | Component used for molten metal and manufacturing method thereof, and molten metal maintaining furnace |
| CN111246606A (en) * | 2020-01-13 | 2020-06-05 | 上海交通大学 | Immersion type aluminum alloy melt heating rod |
| CN111447703A (en) * | 2020-03-02 | 2020-07-24 | 上海交通大学 | Immersion type energy-saving aluminum alloy melt heater |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105491700A (en) * | 2015-10-13 | 2016-04-13 | 常州市武进顶峰铜业有限公司 | Cast-aluminum heater |
| JP6131378B1 (en) * | 2016-12-09 | 2017-05-17 | 三井金属鉱業株式会社 | Heater tube for immersion in molten metal |
| CN108275661B (en) * | 2018-01-16 | 2019-12-20 | 华北水利水电大学 | Method for improving internal temperature uniformity of cubic boron nitride single crystal/polycrystalline synthesis rod |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0214793U (en) * | 1988-07-13 | 1990-01-30 | ||
| JPH0996311A (en) * | 1995-10-02 | 1997-04-08 | Kubota Corp | Spherical bearing structure |
| JP3655684B2 (en) * | 1995-12-28 | 2005-06-02 | 浜松ヒートテック株式会社 | Immersion heater for molten metal |
| JPH11100620A (en) * | 1997-09-25 | 1999-04-13 | Showa Alum Corp | Apparatus for refining metal |
| JP2005142033A (en) * | 2003-11-06 | 2005-06-02 | Osaka Gas Co Ltd | Immersion heater tube |
-
2011
- 2011-08-10 JP JP2011174835A patent/JP4914945B1/en active Active
- 2011-10-28 CN CN 201110333693 patent/CN102932978A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104690262A (en) * | 2013-12-03 | 2015-06-10 | 三井金属矿业株式会社 | Component used for molten metal and manufacturing method thereof, and molten metal maintaining furnace |
| CN104080215A (en) * | 2014-07-02 | 2014-10-01 | 昆山特丰机电设备有限公司 | Non-ferrous metal solution heating bar |
| CN111246606A (en) * | 2020-01-13 | 2020-06-05 | 上海交通大学 | Immersion type aluminum alloy melt heating rod |
| CN111447703A (en) * | 2020-03-02 | 2020-07-24 | 上海交通大学 | Immersion type energy-saving aluminum alloy melt heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4914945B1 (en) | 2012-04-11 |
| JP2013037985A (en) | 2013-02-21 |
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Application publication date: 20130213 |