CN100519128C - High-pressure high-capacity reactor iron core cake casting technics - Google Patents
High-pressure high-capacity reactor iron core cake casting technics Download PDFInfo
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- CN100519128C CN100519128C CNB2006101044163A CN200610104416A CN100519128C CN 100519128 C CN100519128 C CN 100519128C CN B2006101044163 A CNB2006101044163 A CN B2006101044163A CN 200610104416 A CN200610104416 A CN 200610104416A CN 100519128 C CN100519128 C CN 100519128C
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Abstract
A pouring process of high-voltage large-capability reactor iron-core cake arranges the iron-core cake in a die into a pouring tank for pre-heating with the pre-heating temperature ranging from 30 DEG C to 70 DEG C plus or minus 5 DEG C and the pre-heating time ranging from 4h to 6h. After that, the vacuum is pumped in the pouring tank with the vacuum generally less than or equal to 200 Pa. The constant-temperature solidified epoxy resin adhesive is poured into the die, staying still for 0.5h through 3h; the vacuum is then released, the epoxy resin adhesive is supplemented and the pressure is added, staying still for 0.5h through 1h. Finally, the epoxy resin adhesive is solidified to form on constant pressure. The invention solves the technical problems in the prior art of high-temperature solidification and low production efficiency. The invention has the advantages of simple process, low cost, high one-time qualified rate and good pouring quality.
Description
Technical field
The present invention relates to a kind of pouring technology of high voltage large capcity reactor iron core cake.
Background technology
Cake unshakable in one's determination is one of critical component of core type reactor, and the separate unit reactor generally needs tens or tens cakes unshakable in one's determination.Cake unshakable in one's determination mainly contains two kinds on involute-type and radial type.The reactor of high voltage large capcity mostly adopts radial sections heart cake.
The cake unshakable in one's determination of high voltage large capcity reactor is generally taked the integrated poured moulding of High temp. epoxy resins glue pouring technology.Mainly there is following shortcoming in the pouring technology of existing cake unshakable in one's determination:
1. complex procedures.Adopt hot setting, need technical process such as intensification, insulation, cooling, complex procedures.
2. the vacuum to equipment requires high.Time-consuming, expend the energy, equipment is required high.
3. solidification temperature height, solidification temperature reaches 150 ℃, and is wayward.
4. production efficiency is low.Hot setting, moulding generally need 72 hours, and the production cycle is long, and efficient is low.
5. utilization rate of equipment and installations is low.The process that heats up, lowers the temperature is very long, and equipment is in the wait process mostly, and utilization rate is lower.
6. cost height.Adopt high temperature curing process, production equipment needs high temperature resistant, so the equipment cost height.Production temperature height, the time is long, need expend a large amount of electric energy, so production cost is also higher.
7. first-time qualification rate is low.Because operating personnel are bad to the degree of accuracy grasp of parameters such as the temperature that influence product quality, equipment vacuum control, cause the first-time qualification rate of product low.
Summary of the invention
The object of the present invention is to provide a kind of pouring technology of high voltage large capcity reactor iron core cake, it has solved hot setting in the background technology, the technical problem that production efficiency is low.
Technical solution of the present invention is:
A kind of pouring technology of high voltage large capcity reactor iron core cake is characterized in that: this technology comprises following performing step
1) preheating:
(1) cake unshakable in one's determination is packed into mould places in the pouring can;
(2) carry out preheating: preheat temperature is 30～70 ℃ ± 5 ℃, 4～6 hours preheating time;
2) vacuum pouring:
(1) stop heating, pouring can vacuumizes, and vacuum is generally answered≤200Pa.Vacuum is higher, and casting quality better.
(2) epoxide-resin glue of cast normal temperature cure in mould;
(3) leave standstill 0.5～3 hour;
(4) remove vacuum;
(5) epoxide-resin glue of teeming normal temperature cure;
(6) plus-pressure≤1Mpa of institute was left standstill in pressurization 0.5～1 hour.Pressurizeing in the cast back, can improve the osmotic effect of encapsulating compound, shortens hardening time.
(7) pressure relief;
3) solidify: curing molding under normal pressure.
Above-mentioned preheat temperature is advisable with 30～60 ℃ ± 5 ℃.
Be advisable with 5 hours above-mentioned preheating time.
Above-mentioned curing is to be cured to good under normal temperature, normal pressure.Suitably elevated temperature can make to solidify and accelerate, but energy consumption can increase thereupon.
Epoxy resin in the epoxide-resin glue of above-mentioned normal temperature cure is good to adopt bisphenol A type epoxy resin.
The present invention has the following advantages:
1. technology is simple.Adopt normal temperature cure, technical process is simple, is easy to realize.
2. cost is low.Normal temperature cure, the time is short, and energy consumption is low, and also lower to the equipment requirement, therefore, cost is low.
3. production efficiency height.Normal temperature cure, general needs 24 hours, has shortened the production cycle greatly, has improved production efficiency.
4. first-time qualification rate height.Temperature is lower when workpiece preheating and cast, and temperature and equipment vacuum are easy to control, the first-time qualification rate height of product.
5. casting quality is good.Take the method for pressurizeing to improve the osmotic effect of encapsulating compound, make the epoxy resin glue penetration on upper and lower two surfaces of cake unshakable in one's determination even, casting quality is good, also corresponding shortening hardening time.
Description of drawings
Fig. 1 is the schematic diagram of pouring technology of the present invention.
Drawing reference numeral explanation: 1-pouring can, 2-cake workpiece unshakable in one's determination, 3-mould.
The specific embodiment
The present invention is a kind of cold pouring technology, and it adopts the epoxide-resin glue of normal temperature cure, under normal temperature, normal pressure workpiece is carried out vacuum pouring.Concrete steps of the present invention are as follows:
1. preheating: with the cake workpiece unshakable in one's determination mould of packing into, place in the pouring can, carry out.Preheat temperature is 30～70 ℃ ± 5 ℃, is advisable with 30～60 ℃ ± 5 ℃; 4～6 hours preheating time, be advisable with 5 hours.
2. vacuum pouring:
(1) vacuumize: stop heating, pouring can vacuumizes, and makes vacuum≤200Pa.Vacuum is higher, and casting quality can improve but realization condition is corresponding better.
(2) pour into a mould: the epoxide-resin glue of cast normal temperature cure in mould; Left standstill 0.5～3 hour.
(3) back pouring: remove vacuum, the epoxide-resin glue of teeming normal temperature cure.
(4) pressurization is left standstill: the plus-pressure≤1Mpa of institute was left standstill in pressurization 0.5～1 hour.The pressurization of cast back can make the epoxy resin glue penetration on upper and lower two surfaces of cake unshakable in one's determination even, improves the osmotic effect of epoxide-resin glue.
3. solidify: pressure relief, curing molding under normal temperature, normal pressure.Suitably heat, shortened hardening time, but energy consumption can also increase thereupon.Normal temperature cure, general needs 24 hours, can shorten the production cycle greatly.
Epoxy resin in the epoxide-resin glue of normal temperature cure can adopt bisphenol A type epoxy resin etc.
Claims (4)
1. the pouring technology of a high voltage large capcity reactor iron core cake, it is characterized in that: this technology comprises following performing step
1) preheating:
(1) cake workpiece unshakable in one's determination is packed into mould places in the pouring can;
(2) carry out preheating: preheat temperature is 30～70 ℃ ± 5 ℃, 4～6 hours preheating time;
2) vacuum pouring:
(1) pouring can vacuumizes, vacuum≤200Pa;
(2) epoxide-resin glue of cast normal temperature cure in mould;
(3) leave standstill 0.5～3 hour;
(4) remove vacuum;
(5) epoxide-resin glue of teeming normal temperature cure;
(6) plus-pressure≤1MPa of institute was left standstill in pressurization 0.5～1 hour;
(7) pressure relief;
3) solidify: be under normal temperature, normal pressure, to be cured moulding.
2. the pouring technology of high voltage large capcity reactor iron core cake according to claim 1 is characterized in that: described preheat temperature is 30～60 ℃ ± 5 ℃
3. the pouring technology of high voltage large capcity reactor iron core cake according to claim 1 and 2 is characterized in that: be 5 hours described preheating time.
4. the pouring technology of high voltage large capcity reactor iron core cake according to claim 3 is characterized in that: the epoxy resin in the epoxide-resin glue of described normal temperature cure is bisphenol A type epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101044163A CN100519128C (en) | 2006-07-28 | 2006-07-28 | High-pressure high-capacity reactor iron core cake casting technics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101044163A CN100519128C (en) | 2006-07-28 | 2006-07-28 | High-pressure high-capacity reactor iron core cake casting technics |
Publications (2)
| Publication Number | Publication Date |
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| CN101112779A CN101112779A (en) | 2008-01-30 |
| CN100519128C true CN100519128C (en) | 2009-07-29 |
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| CNB2006101044163A Active CN100519128C (en) | 2006-07-28 | 2006-07-28 | High-pressure high-capacity reactor iron core cake casting technics |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930840A (en) * | 2009-06-25 | 2010-12-29 | 越峰电子（昆山）有限公司 | Soft magnetic ferrite magnetic core forming method and forming die thereof |
| CN101826393A (en) * | 2010-04-15 | 2010-09-08 | 上海凯利电器厂有限公司 | Vacuum pouring method for epoxy resin |
| CN101986402B (en) * | 2010-10-12 | 2012-02-29 | 杭州银湖电气设备有限公司 | Preparation method of novel low-noise dry iron-core reactor |
| CN102074334A (en) * | 2010-12-06 | 2011-05-25 | 保定天威集团有限公司 | Current transformer iron core |
| CN103545104A (en) * | 2013-11-06 | 2014-01-29 | 宁夏银利电器制造有限公司 | Pouring method of transformer |
| CN106827335A (en) * | 2016-12-30 | 2017-06-13 | 上海嘉尔成汽车部件有限公司 | A kind of production line of automobile ignition coil infusion epoxy resin |
| CN107599279A (en) * | 2017-08-17 | 2018-01-19 | 国网上海市电力公司 | Gapless turn-to-turn insulation dry-type air-core reactor prepares mould and preparation method of sample |
| CN108039274A (en) * | 2017-12-04 | 2018-05-15 | 襄阳九鼎新茂电气有限公司 | A kind of high voltage reactor iron core column epoxy casting method |
| CN110919946A (en) * | 2019-11-27 | 2020-03-27 | 中国科学院金属研究所 | Vacuum pressure pouring equipment and pouring process for high-voltage transformer |
| CN112466642A (en) * | 2020-11-20 | 2021-03-09 | 济南银河电气有限公司 | Preparation process of amorphous alloy iron core cake for iron core reactor |
| CN113400538A (en) * | 2021-05-20 | 2021-09-17 | 南方医科大学 | Casting mold specimen and manufacturing method thereof |
-
2006
- 2006-07-28 CN CNB2006101044163A patent/CN100519128C/en active Active
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| CN101112779A (en) | 2008-01-30 |
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