CN101730323B - Electric heating mica plate and preparation method thereof - Google Patents
Electric heating mica plate and preparation method thereof Download PDFInfo
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- CN101730323B CN101730323B CN200910186747XA CN200910186747A CN101730323B CN 101730323 B CN101730323 B CN 101730323B CN 200910186747X A CN200910186747X A CN 200910186747XA CN 200910186747 A CN200910186747 A CN 200910186747A CN 101730323 B CN101730323 B CN 101730323B
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- heating resistor
- resistor sheet
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Abstract
The invention relates to an electric heating mica plate and a preparation method thereof. On one hand, a mode of one-time compression molding by laminating a plurality of layers of mica paper and a heating resistor sheet is adopted and is particularly suitable for the electric heating mica plate with the heating resistor sheet, and the combination between the heating resistor sheet and the mica paper adjacent to the heating resistor sheet is more tight and more complete without gaps; on the other hand, the prepared electric heating mica plate has a structure that the heating resistor sheet is in a continuous wave shape transversely and/or longitudinally; the expanding and shrinking range of the heating resistor sheet is moderate; and some forces separating the heating resistor sheet from the two sides which are generated due to expanding with heat, contracting with cold or wetting and other factors between an upper side and a lower side of the heating resistor sheet can be effectively cushioned. In a word, the phenomena of foaming and layering can be effectively avoided; and the power and service life of the heating resistor sheet are guaranteed. The electric heating mica plate is more environment-friendly and safer, and hardly to deform.
Description
Technical field
The present invention relates to a kind of electric heating mica plate and preparation method thereof.
Background technology
Electrical heated appliance is widely used in all kinds of civilian and industrial uses, will use electric heating mica plate usually in the electrical heated appliance.
In the prior art, electric heating mica plate comprises two-layer at least micarex (micarex is suppressed in advance by the mica paper of several layers of dipping and formed) and clamping heating resistive element (heating resistive element can be heating resistance wire, also can be the heating resistor sheet) between micarex.In general, with the micarex that has flooded the agent of organosilicon viscose and heating resistive element (being placed on up and down between the two-layer micarex) range upon range of placement mold pressing compression moulding again, make tabular electric heating mica plate (be generally tabular or arc is tabular).Usually after the compacting, the heating resistive element in the electric heating mica plate with its up and down both sides micarex fully, closely applying.
Electric heating mica plate is as the heater element in the electrical heated appliance; The temperature of electric heating mica plate rises or descends; Its each part (micarex and heating resistive element) expanded by heating or meet cold contraction is because micarex (insulating material) is bigger with the coefficient of expansion difference of heating resistive element (electric conducting material is generally metal material); Therefore in the long-term process of using, heating resistive element is easy to break away from micarex.
Especially when heating resistive element was sheet, the bonded area between the micarex of heating resistor sheet and adjacent both sides was bigger, was easy to break away from, and this area common " foaming ", " layering " phenomenon just take place.In addition on the one hand, when electric heating mica plate did not use, the heating resistor sheet also was prone to break away from because of the influence of the making moist micarex with adjacent both sides.
Above-mentioned " foaming ", " layering " phenomenon cause heating resistor sheet rust corrosion on the one hand easily, influence its heating power and life-span, moreover, produce some harmful poisonous, pernicious gases, not environmental protection in the process that causes using; In addition, cause the heating resistor sheet exposed easily, be prone to naked light, dangerous.
Summary of the invention
One side of the present invention provides a kind of electric heating mica plate; It comprises several layers of mica paper and clamping heating resistor sheet between described several layers of mica paper; Said electric heating mica plate is tabular, and wherein, described heating resistor sheet transversely and/or vertically is continuous wave-like at it.
The electric heating mica plate of technique scheme; Its heating resistor sheet transversely and/or vertically is continuous wave-like at it; Adopt such structure, compare with the heating resistor sheet of the sheet of prior art, himself expansion and the amplitude of contraction of heating resistor sheet comparatively relaxes on the one hand; On the other hand, cushioned effectively the heating resistor sheet up and down between the both sides because of expanded by heating, meet cold contraction or factor such as make moist produces that some make itself and the power of both sides disengaging; Solved the disengaging problem between heating resistor sheet and the adjacent mica paper dexterously; Prevent the generation of " foaming ", " layering " phenomenon effectively, guaranteed the power and the life-span of heating resistor sheet, and more environmental protection and safety; In addition, the electric heating mica plate after the moulding is not yielding yet.
Preferably, described wave-like is a square waveform.The buffering effect of the structure of employing square waveform is better.
Preferably, described square waveform is the square waveform of rule, and its wave amplitude is 0.08 ~ 0.125mm, and half-wavelength is 38～42mm.The inventor finds through a large amount of experimental studies, adopts the square waveform buffering effect of this structure better, more effectively prevents the generation of " foaming ", " layering " phenomenon.
Described mica paper is non-calcinated type phlogopite paper, non-calcinated type muscovite paper or non-calcinated type mica paper.The inventor finds through a large amount of experimental studies, adopts the structure of mica paper the invention described above preferably of these materials, can improve the adhesion between heating resistor sheet and the mica paper, effectively prevents to break away from.
The heating resistor sheet that described heating resistor sheet is 304 stainless steels.The inventor finds through lot of experiments, adopts the structure of heating resistor sheet the invention described above preferably of 304 stainless steels, can bring into play the buffering effect of above-mentioned heating resistor chip architecture better.
Described heating resistor sheet forms through the electric spark cutting processing.The heating resistor sheet resistance that adopts this processing method to make is more accurate.
The present invention provides a kind of preparation method of electric heating mica plate on the other hand; Wherein, Earlier several layers of mica paper, heating resistor lamella that has flooded the agent of organosilicon viscose are stacked and put; Said heating resistor sheet is placed between the several layers of mica paper, the mica paper that is positioned at the adjacent both sides of said heating resistor sheet in the described several layers of mica paper said heating resistor sheet transversely and/or place at interval alternately vertically and the mica paper of adjacent both sides complementary each other; Range upon range of each assembly that places is carried out mold pressing compression moulding, make tabular electric heating mica plate.
The preparation method of the electric heating mica plate of technique scheme; On the one hand; The inventor finds through a large amount of experimental studies are unexpected; Compare elder generation of the prior art and mica paper once is pressed into micarex again micarex and heating resistor lamella is stacked the mode that secondary is pressed into electric heating mica plate of putting, the present invention has adopted directly several layers of mica paper and heating resistor lamella has been stacked the mode of putting a compression moulding, has been fit to adopt the electric heating mica plate of heating resistor sheet especially; The heating resistor sheet is adjacent more closely and more complete, seamless of combination of the mica paper of both sides, prevents the generation of " foaming ", " layering " phenomenon effectively; On the other hand, the electric heating mica plate that makes has the structure of " the heating resistor sheet transversely and/or vertically is continuous wave-like at it ", and himself expansion and the amplitude of contraction of heating resistor sheet comparatively relaxes; The more important thing is, cushioned effectively the heating resistor sheet up and down between the both sides because of expanded by heating, meet cold contraction or factor such as make moist produces that some make itself and the power of both sides disengaging; In a word, solve the disengaging problem between heating resistor sheet and the adjacent mica paper dexterously, prevented the generation of " foaming ", " layering " phenomenon effectively, guaranteed the power and the life-span of heating resistor sheet, and more environmental protection and safety, also more difficult distortion.
The mica paper of the adjacent both sides of said heating resistor sheet is banded mica paper for transversely or vertically going up several that place at interval, and mica paper that should band shape is that multilayer build-up forms.
The width and thickness of the banded mica paper of the adjacent both sides of said heating resistor sheet is consistent, and the thickness of every banded mica paper is 0.05 ~ 0.08mm, and width is 38～42mm.
Described mica paper is non-calcinated type phlogopite paper, non-calcinated type muscovite paper or non-calcinated type mica paper; The heating resistor sheet that described heating resistor sheet is 304 stainless steels.
In sum; Electric heating mica plate of the present invention and preparation method thereof compared with prior art, has solved the disengaging problem between heating resistor sheet and the adjacent mica paper dexterously; Prevent the generation of " foaming ", " layering " phenomenon effectively; Guaranteed the power and the life-span of heating resistor sheet, and more environmental protection and safety, also more difficult distortion.
Description of drawings
Fig. 1 is each position component cross-sectional schematic of electric heating mica plate before the compression moulding;
Fig. 2 is the cross-sectional schematic of electric heating mica plate after each parts compression moulding shown in Figure 1;
Wherein, 1, outer mica paper 2, the banded mica paper 3 of internal layer, stainless steel heating resistor sheet.
Embodiment
Come further to set forth electric heating mica plate of the present invention and preparation method thereof below in conjunction with embodiment.
Electric heating mica plate (long 394mm; Wide 513mm; Thick 0.7mm) preparation:
1, make resistor disc 3 (electric spark cutting processing): the 304 stainless steel heating resistor sheets that the 0.05mm that is up to the standards is thick are cut out (long 420mm; Wide 530mm) about 100, stacks neatly and be fixed on the line cutting guide rail of electric spark CNC wire-cut machine DK7763B; The inspection computer program also is input to the line cutter controller, inspection wire cutting machine tool molybdenum filament and miscellaneous part, and all normal backs start lathe and carry out electric spark cutting processing (constantly making an inspection tour in the cutting processing process); Cutting finishes and resistor disc is immersed cleaning solvent soaks to take out about 15min and drain; Baking was taken out and is got final product in 2 hours in baking oven (270 ℃～280 ℃);
2, the making of mica paper: non-calcinated type mica paper 1 (each 4 are up and down grown: 1420mm of preparing to be arranged on outer field sheet; Wide: 1020mm; And be arranged on several banded non-calcinated type mica papers 2 of the internal layer of the adjacent both sides of heating resistor sheet (long: 1020mm thick 0.075mm); Wide: 40mm; Thick 0.075mm); With these ready mica paper pre-preg organosilicon gluing agent (Suzhou Ju Feng electrical insulation system limited company, JF-1060-9), flooded 0.5 minute, cured 5～7 minutes under 105～110 ℃;
3, make electric heating mica plate: by mode shown in Figure 1; With the banded mica paper 2 of the outer mica paper of making 1, internal layer, the 3 range upon range of placements of stainless steel heating resistor sheet: heating resistor sheet 3 is placed between the banded mica paper 2 of internal layer; As shown in Figure 1; The banded mica paper 2 of the internal layer of both sides is provided with in the transversely staggered compartment of terrain of heating resistor sheet 3 up and down, and the mica paper of both sides is complementary each other up and down, and promptly at interval width equals the width of banded mica paper each other;
For convenient industrial streamlined operation, in general, can carry out preliminary pressurize to range upon range of each parts that places, carry out mold pressing compression moulding after cutting again, this point is well-known to those skilled in the art, specifically referring to as follows:
Pressurize: after range upon range of the placing; Insert in the hydraulic press 250 ℃ earlier; 10MPa～11MPa pressurize 3 hours, nature to 60 ℃ takes out down under situation about keep-uping pressure afterwards, is no less than 3 hours cooling time; Take out the back first finished product is cut out in flakes, as cut out size and can be long 394mm, wide 510mm.(generally will guarantee the centre of resistor disc in institute partition territory when cutting out, it is neat, not stratified that the mica sheet otch is wanted.)
Mold pressing compression moulding: will cut out each electric heating mica plate in blocks with puncher earlier and stamp the plug connector hole, with together putting into mould again in its metal edge frame that pre-sets of packing into; Start hydraulic press, pressure is transferred to the workpiece that 2.5～3Mpa pressurize promptly obtains compression moulding 3 seconds.Reprocessing: the workpiece that presses is taken out from mould, be placed on the drilling machine (rotating speed 1500r/min) and bore the hanger riveted holes, rivet, plug connector is connected get final product at last with 2 * 4 aluminium rivets.
4, to the check of finished product: the check outward appearance does not have breakage, weighs wounded, folding line; Energizing test guarantees that voltage, electric current, power meet design requirement; Check moment puncture voltage etc.
The inspection parameter of embodiment 1 prepared electric heating mica plate is following:
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| Interventions Requested (unit) | Assay |
| Outward appearance | Surfacing, metal forming lines be stealthy, be evenly distributed, no marking and fracture lamination |
| Size (mm) | Long 394 is wide by 513 |
| Power under the voltage 240V (W) | 1180 |
| Impulse current (doubly) | 1.18 |
| Average surface temperature (℃) | 180 |
| The high pressure resistant time (min) under the voltage 2000V | Through |
| Leakage current (mA) under the voltage 2000V voltage | 2 |
Electric heating mica plate after embodiment 1 compression moulding; As shown in Figure 2; Because the staggered in the horizontal compartment of terrain of the banded mica paper 2 of the internal layer of both sides is provided with up and down, middle chimeric heating resistor sheet 3 transversely is continuous square-wave form (continuous in other words meander-like) at it; In addition, because the mica paper of both sides is complementary each other up and down, so after the compression moulding, can be fully closely chimeric between the mica paper of heating resistor sheet and adjacent both sides, there is not foaming, seamless.
The electric heating mica plate and the electric heating mica plate that makes through common manufacture craft of the prior art (wherein the heating resistor sheet of clamping is a flat) of embodiment 1 gained are compared experiment, data such as following table:
| 1.2 rated voltage doubly (240 volts) energising 12 hours | In 300 ℃ of baking ovens, placed 36 hours | |
| First group (embodiment one) | None layering does not have cracking | None layering does not have cracking |
| Second group (common manufacture craft) | Layering fully | 60% layering |
Electric heating mica plate of the present invention and preparation method thereof is not limited to the above embodiments, and all equivalences of doing according to spirit of the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (9)
1. electric heating mica plate, it comprises several layers of mica paper and clamping heating resistor sheet between described several layers of mica paper, said electric heating mica plate is tabular, it is characterized in that: described heating resistor sheet transversely or vertically is continuous wave-like at it.
2. electric heating mica plate according to claim 1 is characterized in that: described wave-like is a square waveform.
3. electric heating mica plate according to claim 2 is characterized in that: described square waveform is the square waveform of rule, and its wave amplitude is 0.08～0.125mm, and half-wavelength is 38～42mm.
4. according to any described electric heating mica plate in the claim 1,2 or 3, it is characterized in that: described mica paper is non-calcinated type phlogopite paper, non-calcinated type muscovite paper or non-calcinated type mica paper.
5. according to any described electric heating mica plate in the claim 1,2 or 3, it is characterized in that: the heating resistor sheet that described heating resistor sheet is 304 stainless steels.
6. according to any described electric heating mica plate in the claim 1,2 or 3, it is characterized in that: described heating resistor sheet forms through the electric spark cutting processing.
7. the preparation method of an electric heating mica plate; It is characterized in that: earlier several layers of mica paper, heating resistor lamella that has flooded the agent of organosilicon viscose are stacked and put; Said heating resistor sheet is placed between the several layers of mica paper; Be positioned in the described several layers of mica paper said heating resistor sheet up and down both sides and with said heating resistor sheet internal layer adjacent mica paper for the heating resistor sheet transversely or staggered compartment of terrain is provided with vertically that several are banded mica paper; And this is positioned at said heating resistor sheet both sides and complementary each other with said heating resistor sheet internal layer adjacent mica paper up and down, and the said mica paper that is band shape is formed by stacking for one or more layers; Range upon range of each assembly that places is carried out mold pressing compression moulding, make tabular electric heating mica plate, and the heating resistor sheet in the said electric heating mica plate transversely or vertically is continuous wave-like at it.
8. method according to claim 7 is characterized in that: described several are the width and thickness unanimity of the mica paper of band shape, and the thickness of every banded mica paper is 0.05～0.08mm, and width is 38～42mm.
9. according to claim 7 or 8 described methods, it is characterized in that: described mica paper is non-calcinated type phlogopite paper, non-calcinated type muscovite paper or non-calcinated type mica paper; The heating resistor sheet that described heating resistor sheet is 304 stainless steels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910186747XA CN101730323B (en) | 2009-12-21 | 2009-12-21 | Electric heating mica plate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910186747XA CN101730323B (en) | 2009-12-21 | 2009-12-21 | Electric heating mica plate and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101730323A CN101730323A (en) | 2010-06-09 |
| CN101730323B true CN101730323B (en) | 2012-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910186747XA Active CN101730323B (en) | 2009-12-21 | 2009-12-21 | Electric heating mica plate and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103711616A (en) * | 2014-01-03 | 2014-04-09 | 郑州金阳电气有限公司 | Diesel engine air-suction air heater |
| CN106567927B (en) * | 2015-10-13 | 2018-05-04 | 自贡东光汽车配件有限公司 | A kind of Novel sealing cushion and its manufacture method |
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