CN102938317B - The manufacture method of low-noise capacitor and low-noise capacitor - Google Patents
The manufacture method of low-noise capacitor and low-noise capacitor Download PDFInfo
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- CN102938317B CN102938317B CN201110234769.6A CN201110234769A CN102938317B CN 102938317 B CN102938317 B CN 102938317B CN 201110234769 A CN201110234769 A CN 201110234769A CN 102938317 B CN102938317 B CN 102938317B
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Abstract
The invention discloses a kind of manufacture method of low-noise capacitor.The present invention is mainly for the capacitor of fuse flattening type, particularly exchange the capacitor that occasion uses, according to the thermal conductivity law of film, sum up the hot pressing time of different-thickness capacitor, according to the temperature-resistance characteristic of film, determine the hot pressing temperature of unlike material capacitor, ensure that every thin film of capacitor all can stick together securely, reach the object reducing capacitor noise.Present invention also offers a kind of low-noise capacitor manufactured according to described manufacture method.
Description
Technical field
The present invention relates to a kind of method manufacturing low-noise capacitor, the invention still further relates to the low-noise capacitor using this manufacture method to manufacture.
Background technology
Along with the extensive use suppressing powered electromagnetic interference capacitors device and step-down line capacitor in numerous controllers such as such as LED illumination, heater of hair straightener, inductive switch, the noise that capacitor sends at work is more and more paid attention to.To this, different manufacturers has attempted adopting diverse ways to reduce the noise of capacitor.Someone adopts high temperature polymerization method, although can reach certain effect, there is the problem of capacitor bulge and charge-discharge performance decline.CN2476086Y adopts the mode of immersion oil or waxdip to solve noise problem, but because suppressing powered electromagnetic interference capacitors device and step-down circuit capacitor body to amass less, very inconvenient production.Therefore, a kind of manufacture method and low-noise capacitor of simple and effective low-noise capacitor is badly in need of.
Summary of the invention
In order to solve problems of the prior art, the object of the invention is the capacitor for fuse flattening type, particularly exchange the capacitor that occasion uses, the low-noise capacitor a kind of manufacture method of simple and effective low-noise capacitor being provided and using the method to manufacture.
In the prior art, hot pressing is just in order to make fuse shape, and therefore when seeking to solve noise problem, engineers at other field seeking solution, and can not expect the noise performance by regulating hot compression parameters and varying capacitors simply.The present inventor, after the reason formed noise and existing technique have carried out deep thinking and a large amount of experiments, is surprised to find that, according to the thermal conductivity law of film, sums up the hot pressing time of different-thickness capacitor; According to the temperature-resistance characteristic of film, determine the hot pressing temperature of unlike material capacitor, ensure that every thin film of capacitor all can stick together securely, just reach the object reducing capacitor noise.As can be seen from the results, this method when regulating hot compression parameters simply, can significantly reduce the noise of capacitor.
To achieve these goals, the invention provides a kind of manufacture method of low-noise capacitor, the method comprises the following steps:
Winding: metallizing film winding is become capacitor body according to the capacity of capacitor, size;
Hot pressing: by the capacitor body thermocompression forming of coiling and molding under certain hot pressing temperature and hot pressing time, makes its every one deck fully fit;
Assembling: by the capacitor body after hot pressing through metal spraying, be polymerized, energize, spot welding, encapsulation, the step such as solidification, be fabricated to fabricated capacitors;
Wherein, different hot pressing temperatures is determined according to the unlike material of metallized film: the hot pressing temperature of common metal polypropylene screen is 90 DEG C-100 DEG C; The hot pressing temperature of high temperature metallization polypropylene screen is 100 DEG C-115 DEG C; The hot pressing temperature of metallized polyester film is 120 DEG C-140 DEG C; Preferably, described hot pressing temperature is: the hot pressing temperature of common metal polypropylene screen is 95 DEG C; The hot pressing temperature of high temperature metallization polypropylene screen is 110 DEG C; The hot pressing temperature of metallized polyester film is 130 DEG C;
Different hot pressing times is determined according to the thermal conductivity law of different film and the different-thickness of capacitor.Thermal conductivity law when following table is the hot-pressing high-temperature metallized polypropylene film recorded: hot pressing temperature 105 DEG C, pressure 0.65Mpa, before hot pressing, temperature-sensitive head inserts capacitor body center, writing time is started when heating platen closes, until thermometer displays temperature reaches 100 DEG C, thermometer adopts TES1310TYPEK digit thermometer.
According to the curve chart of above Plotting data as shown in Figure 1.
Can show that different-thickness capacitor body central temperature reaches the time required for 100 DEG C by Fig. 1.Actual hot pressing time is not less than 1.2 times of the above-mentioned time.When guaranteeing that fuse end face does not occur shinny, determine that the shortest time of hot pressing must not lower than 1.2 in curve times.If hot pressing time is t (unit is second), Core thickness is d (unit is millimeter), then, during d≤3, hot pressing time is 80 ~ 120s; During 3 < d≤13,1.2 × (66d-87)≤t≤1.5 × (66d-87); During 13 < d, 1.2 × (211d-1945)≤t≤1.5 × (211d-1945).Preferably, during d≤3, hot pressing time is 100s; During 3 < d≤13,1.2 × (66d-87)≤t≤1.3 × (66d-87), during 13 < d, 1.2 × (211d-1945)≤t≤1.3 × (211d-1945).
For guaranteeing effective enforcement of above-mentioned technique, the quantity of each hot pressing should be consistent substantially, adopts and can determine that the fence tool of capacitor core quantum count realizes.
The invention still further relates to a kind of low-noise capacitor using the method to manufacture.
The invention still further relates to a kind of low-noise capacitor using the method to manufacture, wherein, in quiet room, the noise that described capacitor is measured at energising 220VAC, 50Hz, 10cm place is below 35dB.
Use method of the present invention can without the need to increasing any equipment, and easy and simple to handle, significantly reduce the noise of capacitor simultaneously.
Accompanying drawing explanation
Fig. 1 is that the hot pressing time required when reaching 100 DEG C of fuse central temperature is to the curve chart of the thickness of capacitor.
Embodiment
Embodiment 1
Material: high temperature metallization polypropylene screen, specification 7.5*14*2
Hot pressing temperature: 100 DEG C
Core thickness: 4.5mm
Hot pressing time: 400s
Fence tool: occupy more than ninety percent
Effect: survey capacitor noise in quiet room, it is 32dB that energising 220VAC, 50Hz, 10cm survey noise.
Embodiment 2
Material: high temperature metallization polypropylene screen, specification 7*21*2
Hot pressing temperature: 110 DEG C
Core thickness: 8.5mm
Hot pressing time: 560s
Fence tool: occupy more than ninety percent
Effect: survey capacitor noise in quiet room, it is 33dB that energising 220VAC, 50Hz, 10cm survey noise.
Embodiment 3
Material: high temperature metallization polypropylene screen, specification 5*26*1.5
Hot pressing temperature: 115 DEG C
Core thickness: 7.7mm
Hot pressing time: 500s
Fence tool: occupy more than ninety percent
Effect: survey capacitor noise in quiet room, it is 30dB that energising 220VAC, 50Hz, 10cm survey noise.
Comparative example 1
In existing technique:
Material: high temperature metallization polypropylene screen, specification 5*26*1.5
Hot pressing temperature: 115 DEG C
Core thickness: 7.7mm
Hot pressing time: 240s
Fence tool: occupy more than ninety percent
Effect: survey capacitor noise in quiet room, it is 51dB that energising 220VAC, 50Hz, 10cm survey noise.
As can be seen from above experimental result, the capacitor of manufacturing method according to the invention manufacture can reduce the noise of capacitor significantly in noise test, and the present invention is without the need to increasing any equipment, and operation is simple; Capacitor constructed in accordance and capacitor outward appearance of the prior art and capacity do not have difference, the capacitor used under each occasion in prior art can be replaced easily.
Claims (6)
1. a manufacture method for low-noise capacitor, the method comprises the following steps:
Winding: metallized polymeric film is wound into capacitor body according to the capacity of capacitor, size;
Hot pressing: by the capacitor body of coiling and molding thermocompression forming on mould under certain hot pressing temperature and hot pressing time, makes its every one deck fully fit;
Assembling: by the capacitor body after hot pressing through metal spraying, be polymerized, energize, spot welding, encapsulation, curing schedule, be fabricated to fabricated capacitors,
Wherein, different hot pressing temperatures is determined according to the unlike material of metallized film: the hot pressing temperature of common metal polypropylene screen is 90 DEG C-100 DEG C; The hot pressing temperature of high temperature metallization polypropylene screen is 100 DEG C-115 DEG C; The hot pressing temperature of metallized polyester film is 120 DEG C-140 DEG C;
If hot pressing time is t (unit is second), Core thickness is d (unit is millimeter), then, during d≤3, hot pressing time is 80 ~ 120s; During 3<d≤13,1.2 × (66d-87)≤t≤1.5 × (66d-87); During 13<d, 1.2 × (211d-1945)≤t≤1.5 × (211d-1945).
2. manufacture method according to claim 1, wherein, described hot pressing temperature is: the hot pressing temperature of common metal polypropylene screen is 95 DEG C; The hot pressing temperature of high temperature metallization polypropylene screen is 110 DEG C; The hot pressing temperature of metallized polyester film is 130 DEG C.
3. manufacture method according to claim 1, wherein, described hot pressing time is:
If hot pressing time is t (unit is second), Core thickness is d (unit is millimeter), then, during d≤3, hot pressing time is 100s; During 3<d≤13,1.2 × (66d-87)≤t≤1.3 × (66d-87); During 13<d, 1.2 × (211d-1945)≤t≤1.3 × (211d-1945).
4. manufacture method according to claim 1, wherein, described mould is a kind of on fixed-area, determines the fence tool of capacitor core quantum count.
5. a low-noise capacitor, its manufacture method manufacture according to any one of Claims 1 to 4.
6. low-noise capacitor according to claim 5, wherein, in quiet room, the noise that described capacitor is measured at energising 220VAC, 50Hz, 10cm place is below 35dB.
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| CN201110234769.6A CN102938317B (en) | 2011-08-16 | 2011-08-16 | The manufacture method of low-noise capacitor and low-noise capacitor |
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| CN201110234769.6A CN102938317B (en) | 2011-08-16 | 2011-08-16 | The manufacture method of low-noise capacitor and low-noise capacitor |
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| CN102938317A CN102938317A (en) | 2013-02-20 |
| CN102938317B true CN102938317B (en) | 2016-03-30 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107799308A (en) * | 2017-10-23 | 2018-03-13 | 东莞市弘富瑞电子有限公司 | A kind of process for reducing noise of film capacitor |
| CN107658132A (en) * | 2017-10-23 | 2018-02-02 | 安徽江威精密制造有限公司 | A kind of high-specific energy pulse capacitor element thermoforming process |
| CN108831764B (en) * | 2018-05-28 | 2020-03-24 | 四川中星电子有限责任公司 | Preparation method of low-noise film capacitor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101026036A (en) * | 2006-02-17 | 2007-08-29 | 上海皓月电容器有限公司 | Capacitor with good capacity-temperature stabilization and its preparing method |
| CN101399118A (en) * | 2007-09-30 | 2009-04-01 | 扬州高强电子有限公司 | Technique for processing non-inductive organic film capacitor |
| CN101567265A (en) * | 2009-06-04 | 2009-10-28 | 上海春黎电子实业有限公司 | Manufacturing method capable of effectively improving product life of capacitor |
| CN102129910A (en) * | 2010-12-24 | 2011-07-20 | 珠海格力新元电子有限公司 | Process method for reducing noise of film capacitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100744614B1 (en) * | 2006-02-22 | 2007-08-01 | 성호전자(주) | Method for manufacture of film capacitor |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101026036A (en) * | 2006-02-17 | 2007-08-29 | 上海皓月电容器有限公司 | Capacitor with good capacity-temperature stabilization and its preparing method |
| CN101399118A (en) * | 2007-09-30 | 2009-04-01 | 扬州高强电子有限公司 | Technique for processing non-inductive organic film capacitor |
| CN101567265A (en) * | 2009-06-04 | 2009-10-28 | 上海春黎电子实业有限公司 | Manufacturing method capable of effectively improving product life of capacitor |
| CN102129910A (en) * | 2010-12-24 | 2011-07-20 | 珠海格力新元电子有限公司 | Process method for reducing noise of film capacitor |
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