CN101777421A - Method for manufacturing voltage transformer by vacuum pressure gelation - Google Patents
Method for manufacturing voltage transformer by vacuum pressure gelation Download PDFInfo
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- CN101777421A CN101777421A CN200910045129A CN200910045129A CN101777421A CN 101777421 A CN101777421 A CN 101777421A CN 200910045129 A CN200910045129 A CN 200910045129A CN 200910045129 A CN200910045129 A CN 200910045129A CN 101777421 A CN101777421 A CN 101777421A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000001879 gelation Methods 0.000 title claims abstract description 13
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 239000003822 epoxy resin Substances 0.000 claims description 8
- 229920000647 polyepoxide Polymers 0.000 claims description 8
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 238000013022 venting Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000011417 postcuring Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000007872 degassing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
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Abstract
The invention relates to a method for manufacturing a voltage transformer by vacuum pressure gelation, which is mainly used for improving the product quality, the production efficiency of manufacture, and the like. With the technical scheme, the method comprises the following steps of: preliminarily installing a die; closing the die and evacuating; injecting and discharging gas-liquid in a vacuum state; sealing an exhaust port; squeezing out residual gas by pressure injection and automatically gelatinizing; precuring under the conditions of set temperature and time; postcuring in a baking oven under the conditions of set temperature and time after opening the die; and cooling for molding. The invention is suitable for manufacturing various types and specifications of voltage transformers.
Description
Technical field:
The present invention relates to the manufacture method of a kind of voltage transformer, particularly a kind of voltage transformer.
Background technology:
Pouring technology in the existing voltage transformer manufacturing process is to be undertaken by following three steps:
1. the device body of making is installed in the mould, puts into vacuum tank behind the artificial matched moulds, under vacuum state, the epoxy resin after mixing vacuumized is poured into mould under normal pressure, and bubble is discharged by mould upper end exhaust outlet;
2. the mould after will pouring into a mould is packed into and is solidified in the baking oven, and heating is 8 to 10 hours under the temperature of setting, and treats to release baking oven or cooling gradually in baking oven after the goods full solidification;
3. the mould that will cool off fully takes out goods by artificial form removal, clears up then, checks, repairs, and finishes voltage transformer cast overall process.
Above-mentioned manufacture method, mold attaching/detaching, carrying manual operation, labour intensity is big, and the dress mould is time-consuming; Because manual operation, mould is unsuitable excessive overweight, so mould structure is thin, and intensity is low, the life-span short (generally about 2000 times); Resin is that exhaust effect is poor in the exhaust of normal pressure open type in the mould, thereby exhaust outlet is big, and promptly rising head is big after the moulding, has not only taken material but also difficult excision; After the cast, mould is put into the baking oven back and is solidified, the mould heaviness, and not only workload is big, also accounts for the baking oven effective working space; Normal pressure cast under the vacuum state, product strength is lower, and mobile poor, should not make the complicated product of structure; Gel heats the nature gel under the normal pressure in baking oven, be unfavorable for improving product strength; The cleaning work amount is big, and, overlap big because of rising head is how thick and hard, and presentation quality is not good.
Summary of the invention:
Technical problem to be solved by this invention is, a kind of improved method for manufacturing voltage transformer by vacuum pressure gelation is provided, it can significantly improve Products Quality, reduces the material consumption of making, and improves production efficiency of making and the utilance that improves making apparatus greatly.
The technical scheme that the present invention solves the problems of the technologies described above employing is: the characteristics of method for manufacturing voltage transformer by vacuum pressure gelation are to adopt the following step:
1. preparation---mould is installed on the make-up machine, again the device body is installed on the described mould;
2. vacuumize---described mould is carried out matched moulds vacuumize;
3. injection---under vacuum state, the epoxy resin after mixing vacuumized is injected into described mould under the pressure of setting, and this die venting mouth is discharged bubble certainly;
4. the envelope exhaust outlet---after described mould was filled with, oil cylinder sealed described exhaust outlet;
5. vasopressing injection and gel---under the moulding pressure of setting, inject and extrude remaining bubble, thereupon gel automatically;
6. preceding curing---behind the gel, under the temperature and time condition of setting, solidify before realizing;
7. solidify the back---and preceding curing back is by the make-up machine die sinking, and goods are put into baking oven after cleaning, inspection, repairing, under the oven temperature of setting, by the time of setting, curing after finishing;
8. cooling forming---after the full solidification, goods take out or cooling gradually in baking oven, finish whole production processes.
The present invention adopts said method, owing to inject in the vacuum state downforce, can obviously improve product strength, gel is to carry out under pressure simultaneously, and the automatic gel of heated pressure can further improve product strength, the good fluidity of vacuum pressure injection, but the processing structure the part with complicated structure, not only quality assurance, and also presentation quality is good; The operation of Mould opening and closing machine tool saves time, laborsaving, and can adopt high-strength die, ten times of the life-span long numbers that adopts than prior art die life improve equipment operating efficiency and utilance; Adopt force-type exhaust under the pressure, exhaust effect is remarkable, not only improves the quality of products, and emits young, overlap is few and soft, easy to clean improves operating efficiency and presentation quality, and reduces material consumption, amid all these factors, the method that the present invention adopts not only has than obvious improvement technically, and also can bring higher benefit economically.
Description of drawings:
Fig. 1 is a method for manufacturing voltage transformer by vacuum pressure gelation FB(flow block) of the present invention.
Fig. 2 is that the present invention makes the equipment vacuum suspension type hydraulic forming machine schematic diagram that adopts.
Embodiment:
With reference to Fig. 1, the flow process of method for manufacturing voltage transformer by vacuum pressure gelation includes preparation, vacuumize, injection, the envelope exhaust outlet, vasopressing injection and gel, preceding curing, solidify the back, the cooling forming supervisor, above-mentioned making flow process is to carry out on make-up machine, the type make-up machine such as a kind of vacuum suspension type hydraulic forming machine, its China Patent No. is ZL200420022098.2, its structure as shown in Figure 2, this make-up machine includes vacuum tank 1, move left grillage 2, left side template 3, the right template 7 and grillage 8 compositions such as grade that move right, the voltage transformer by vacuum pressure gelation operation can be carried out on this machine, and its corresponding flow process is:
1. preparation---on the left and right mobile grillage 2,8 of existing vacuum suspension type hydraulic forming machine (as Fig. 2), be respectively arranged with left and right template 3,7, be that left and right mould 4,6 is fixedly mounted on respectively on the left and right template 3,7 in the preparation work, again the device body of making (the device body of voltage transformer) is installed on the mould (combination of left and right mould 4,6) subsequently, usually all be to adopt single pair of mould, be different from traditional mould of overpaying; This hydraulic forming machine such as Chinese patent (patent No. 200420022098.2).
2. vacuumize---after mould is installed, hydraulic forming machine is under the promotion of left oil cylinder, moving left grillage 2 and left template 3 is being with mould to carry out matched moulds, at this moment, mould is to be positioned at vacuum tank 1, vacuum tank 1 enters thereupon and covers sealing state, vacuum pump starts operation subsequently, through air extraction connector with vacuum tank 1 in air find time, vacuum tank 1 inner chamber (comprises that mould forms the vacuum degree of setting, restart right oil cylinder and promote to move right grillage 8, the guide rail that the grillage 8 that moves right is provided with in vacuum tank 1 inner chamber is moved to the left, and finishes until mould assembling action.
3. injection---this program is to carry out on existing Thin-film degassing injection Car (as China Patent No. 200520039749.3), after the matched moulds program is finished, under vacuum state, through Thin-film degassing injection Car, mixing is vacuumized later epoxy resin, be injected in the above-mentioned mould under the condition of the pressure 1～3bar that sets, most of bubble is discharged under squeezed state by mould upper end exhaust outlet in the mould, fills with epoxy resin until mould.
4. gas port---after mould was filled with epoxy resin, the cylinder action of the jacking mechanism 5 (as Fig. 2) that is provided with on left template 3 was with the exhaust outlet sealing of mould upper end.
5. vasopressing injection and gel---after the exhaust outlet sealing, be injected at by the film degassing and strengthen injection pressure again and inject, its corresponding injection pressure is set at 4～5bar usually, in the effect of this moulding pressure, once more remaining bubble is extruded in the air bag of mould, the present invention adopts this adding to depress the force-type exhaust mode, and its exhaust effect is remarkable, and its rising head can be made into reduced size, overlap is few and soft, not only can save materials, and clear up easy, presentation quality might as well; In above-mentioned vasopressing injection process, promptly under heating, pressure condition, carry out automatic gel, be to guarantee product quality, reach one of key factor of specification requirement.
6. preceding curing---behind vasopressing injection and gel, be under 110 ℃ to 150 ℃ the condition in the holding temperature of setting, and through the time of setting be 10 minutes to 40 minutes, program curing before realizing.
7. solidify the back---after before realization, solidifying, control vacuum suspension type hydraulic forming machine, finish the die sinking action by the left and right mobile grillage 2,8 of its left and right hydraulic oil cylinder driving, take out voltage transformer through preceding program curing thereupon, and it is cleared up, checks and repair, voltage transformer after repairing is put into baking oven, subsequently temperature of oven is adjusted to 110 ℃ to 150 ℃ of setting, and under the design temperature condition time of heating setpoint be 8 hours to 10 hours, thereby finish program curing behind the epoxy resin of voltage transformer; In the above-mentioned baking oven operation, because goods are light and handy, handling workload is little, improves operating efficiency, and goods also can stack, and make full use of oven space, improves utilization rate of equipment and installations; Above-mentioned back solidification process, the institutional framework of energy homogenizing epoxy resin is the another key factor that improves product strength.
8. cooling forming---behind the program curing, the goods full solidification can be taken out from baking oven after finishing, and cooling gradually under natural environment also can be cooled off in baking oven gradually, finishes whole production processes.
Claims (5)
1. method for manufacturing voltage transformer by vacuum pressure gelation is characterized in that adopting the following step:
A. preparation---mould is installed on the make-up machine, again the device body is installed on the described mould;
B. vacuumize---described mould is carried out matched moulds vacuumize;
C. injection---under vacuum state, the epoxy resin after mixing vacuumized is injected into described mould under the pressure of setting, and this die venting mouth is discharged bubble certainly;
D. seal exhaust outlet---after described mould was filled with, oil cylinder sealed described exhaust outlet;
E. vasopressing injection and gel---under the moulding pressure of setting, inject and extrude remaining bubble, thereupon gel automatically;
F. solidify before---behind the gel, under the temperature and time condition of setting, solidify before realizing;
G. solidify the back---and preceding curing back is by the make-up machine die sinking, and goods are put into baking oven after cleaning, inspection, repairing, under the oven temperature of setting, by the time of setting, curing after finishing;
H. cooling forming---after the full solidification, goods take out or cooling gradually in baking oven, finish whole production processes.
2. method for manufacturing voltage transformer by vacuum pressure gelation according to claim 1 is characterized in that the setting pressure of injecting is 1 to 3bar.
3. method for manufacturing voltage transformer by vacuum pressure gelation according to claim 1 is characterized in that moulding pressure that vasopressing injection is set is 4 to 5bar.
4. method for manufacturing voltage transformer by vacuum pressure gelation according to claim 1, solidifying the temperature of setting before it is characterized in that is 110 ℃ to 150 ℃, the time that preceding curing is set is 10 to 40 minutes.
5. method for manufacturing voltage transformer by vacuum pressure gelation according to claim 1 is characterized in that it is 110 ℃ to 150 ℃ that the oven temperature of setting is solidified in the back, and the time of setting is 8 to 10 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910045129A CN101777421A (en) | 2009-01-09 | 2009-01-09 | Method for manufacturing voltage transformer by vacuum pressure gelation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910045129A CN101777421A (en) | 2009-01-09 | 2009-01-09 | Method for manufacturing voltage transformer by vacuum pressure gelation |
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| Publication Number | Publication Date |
|---|---|
| CN101777421A true CN101777421A (en) | 2010-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910045129A Pending CN101777421A (en) | 2009-01-09 | 2009-01-09 | Method for manufacturing voltage transformer by vacuum pressure gelation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773966A (en) * | 2011-05-12 | 2012-11-14 | 重庆华虹仪表有限公司 | Once compression molding method of integrated transformer shell |
| CN103213245A (en) * | 2013-03-27 | 2013-07-24 | 国家电网公司 | Vacuum cover for manufacturing mutual inductor and mutual inductor manufacturing device utilizing same |
| CN103568192A (en) * | 2012-07-24 | 2014-02-12 | 上海精成电器成套有限公司 | Processing technology method for pressure injection gel-formed epoxy resin cast bus duct |
| CN104299765A (en) * | 2014-01-13 | 2015-01-21 | 国家电网公司 | Zero-partial discharge pressure gel forming method for potential transformer |
| CN104299766A (en) * | 2014-01-08 | 2015-01-21 | 国家电网公司 | Pressure gel forming method for multi-winding current transformer |
| CN109648755A (en) * | 2018-12-19 | 2019-04-19 | 北京华强诚信电器有限公司 | A kind of mutual inductor baking molding control system and method |
| CN114055722A (en) * | 2021-11-17 | 2022-02-18 | 昆山六二丰塑胶电子有限公司 | Router shell production facility based on continuous injection moulding deviates from |
-
2009
- 2009-01-09 CN CN200910045129A patent/CN101777421A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773966A (en) * | 2011-05-12 | 2012-11-14 | 重庆华虹仪表有限公司 | Once compression molding method of integrated transformer shell |
| CN103568192A (en) * | 2012-07-24 | 2014-02-12 | 上海精成电器成套有限公司 | Processing technology method for pressure injection gel-formed epoxy resin cast bus duct |
| CN103213245A (en) * | 2013-03-27 | 2013-07-24 | 国家电网公司 | Vacuum cover for manufacturing mutual inductor and mutual inductor manufacturing device utilizing same |
| CN103213245B (en) * | 2013-03-27 | 2015-11-18 | 国家电网公司 | Transformer manufacture vacuum (-tight) housing and use the transformer manufacturing installation of this vacuum (-tight) housing |
| CN104299766A (en) * | 2014-01-08 | 2015-01-21 | 国家电网公司 | Pressure gel forming method for multi-winding current transformer |
| CN104299766B (en) * | 2014-01-08 | 2016-08-17 | 国家电网公司 | A kind of Multiple coil current transformer pressure gel forming method |
| CN104299765A (en) * | 2014-01-13 | 2015-01-21 | 国家电网公司 | Zero-partial discharge pressure gel forming method for potential transformer |
| CN104299765B (en) * | 2014-01-13 | 2016-06-08 | 国家电网公司 | A kind of zero innings of electric discharge pressure mutual inductor pressure gel forming solution |
| CN109648755A (en) * | 2018-12-19 | 2019-04-19 | 北京华强诚信电器有限公司 | A kind of mutual inductor baking molding control system and method |
| CN114055722A (en) * | 2021-11-17 | 2022-02-18 | 昆山六二丰塑胶电子有限公司 | Router shell production facility based on continuous injection moulding deviates from |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100714 |