CN101826393A - Vacuum pouring method for epoxy resin - Google Patents
Vacuum pouring method for epoxy resin Download PDFInfo
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- CN101826393A CN101826393A CN 201010146764 CN201010146764A CN101826393A CN 101826393 A CN101826393 A CN 101826393A CN 201010146764 CN201010146764 CN 201010146764 CN 201010146764 A CN201010146764 A CN 201010146764A CN 101826393 A CN101826393 A CN 101826393A
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Abstract
The invention provides a vacuum pouring method for epoxy resin, which is characterized by comprising the following detailed steps: 1, pre-heating a vacuum pouring jar to 70+/-5 DEG C and pre-heating a material mixing jar to 40+/-5 DEG C; 2, sequentially adding 100 weight parts of epoxy resin and 100 weight parts of epoxy resin curing agent into the material mixing jar, stirring and mixing the materials, heating the material mixing jar to 60 DEG C, and stirring the mixture to deaerate for 3 to 5 hours under a vacuum degree of over 5mbar; and 3, heating the vacuum pouring jar to 70 DEG C, after keeping the temperature for 1 hour, vacuumizing the jar, keeping vacuum degree of over 5mbar for 3 to 5 hours, pouring the epoxy resin mixture until the distance from the liquid level to the top end of a die is 20mm, standing the jar for 10 to 15 minutes, relieving vacuum, and recharging the epoxy resin mixture to the liquid level according to the fall back condition the of the liquid level. The vacuum pouring method has the advantages of simple process and low cost.
Description
Technical field
The present invention relates to a kind of vacuum casting method for epoxy resin, be used to seal insulating dry type transformer coil, belong to transformer manufacture method technical field.
Background technology
Epoxide resin vacuum cast does not in the past have clear and definite quantification regulation to vacuum degree, temperature, the time of process, and operability is not strong, and Quality Process is wayward, and material consumption is bigger.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming, a kind of vacuum casting method for epoxy resin is provided.
In order to achieve the above object, technical scheme of the present invention provides a kind of vacuum casting method for epoxy resin, it is characterized in that, concrete steps are:
The first step, the vacuum pouring jar is preheating to 70 ± 5 ℃, mixing tank is preheating to 40 ± 5 ℃; The work car that is loaded with transformer coil mould to be cast is advanced in the vacuum pouring jar, one end of 〉=100 ℃ transparent heat resistant plastic pipes is linked to each other with cast valve in the vacuum pouring jar, the other end reaches the interior position apart from bottom 100-200mm of transformer coil mould to be cast, closes vacuum pouring jar door;
Second step, epoxy resin 100 weight portions and epoxy curing agent 100 weight portions are added in the mixing tank mix successively, mixing tank is heated to 60 ℃, more than vacuum degree 5mbar, stir degassing 3-5h;
The 3rd the step, the vacuum pouring jar is heated to 70 ℃, keep beginning to vacuumize after 1 hour, more than vacuum degree 5mbar, keep 3-5h, the casting epoxy resin mixture arrives the height apart from die tip 20mm up to liquid level, left standstill 10-15 minute, remove vacuum, fall situation after-teeming epoxy resin composition after rise to above-mentioned liquid level according to liquid level.
Advantage of the present invention is: this method of operation has provided vacuum degree, temperature and time and has quantized regulation, can realize effective control of Quality Process, effectively suppresses and reduce the generation of defective, economical with materials.
Embodiment
Specify the present invention below in conjunction with embodiment.
Embodiment 1
Raw material:
| Raw material | Manufacturer | Model | Composition |
| Epoxy resin | The Jiaxing City factory that orientalizes | ??GE9305F | Bisphenol A epoxide resin |
| Epoxy curing agent | The Jiaxing City factory that orientalizes | ??GH9305F | The adjacent stupid dicarboxylic acid anhydride of tetrahydrochysene |
Technical process:
(1), the preparatory stage:
Check that the vacuum pouring system has or not gas leakage, whether various instrumentations are normal, and whether pipeline is unimpeded, notify the relevant personnel at once and keep in repair if pinpoint the problems.
If ambient temperature is low to cause the viscosity of raw material bigger, mobile when relatively poor, use the back of can liquefying under 35 ℃ environment.
The vacuum pouring jar is preheating to 70 ℃, and mixing tank is preheating to 40 ℃;
The transformer coil mold work car of needs cast is advanced in the vacuum pouring jar, getting 100 ℃ transparent heat resistant plastic pipe receives on the cast valve and with pipe collar and locks, plastic tube puts in the pour mass apart from about the about 150mm in bottom, and with binding strap gate spool is fixed on the casting mold, check and close the pouring can door after errorless.
(2), batch mixing and vacuum degassing stage:
Successively mixing in epoxy resin 100 weight portions and the epoxy curing agent 100 weight portions adding mixing tank;
Open the heat conduction circulation valve, start heater, agitating device successively.
Mixing tank is heated to 60 ℃, more than vacuum degree 5mbar, stirs degassing 3h, do not have bubble with material surface and be as the criterion.
(3), the vacuum pouring stage:
Open the heat conduction valve, start heating system;
The vacuum pouring jar is heated to 70 ℃, keeps beginning to vacuumize after 1 hour, more than vacuum degree 5mbar, keep 3h;
Slowly open the cast valve, control solation speed will notice in this process whether mould has the glue of leakage phenomenon, find to leak glue and in time stop cast, remove the pouring can vacuum, after opening the pouring can door and handling, again vacuumize and reach the process stipulation value, pour into a mould again.
Coil top is closed the cast valve and is observed the liquid level position situation after seeing glue, pours into a mould according to liquid level decision whether continuing to open cast valve.When liquid level reaches apart from mold height 20mm, stop cast, and under vacuum state, left standstill 10 minutes.
Leave standstill and finish slowly releasing vacuum of back.Open the pouring can door after removing vacuum, fall the situation after-teeming after rise to the above-mentioned requirements height, release the work car, change curing oven over to and be cured processing according to liquid level.
(4), reprocessing:
After pouring, should as early as possible remaining compound be emitted.Acetone with capacity cleans running gate system twice.Attention: when cleaning mixing tank, must be noted that the temperature of mixing tank can not be above 40 ℃ with acetone.No burning during cleaning.After if running gate system is cleaned, unused time surpasses 72 hours, must clean again before cast, and allow pipeline re-use after the intensive drying under natural environment.
Embodiment 2
Raw material:
| Raw material | Manufacturer | Model | Composition |
| Epoxy resin | The Jiaxing City factory that orientalizes | ??GE9305F | Bisphenol A epoxide resin |
| Raw material | Manufacturer | Model | Composition |
| Epoxy curing agent | The Jiaxing City factory that orientalizes | ??GH9305F | The adjacent stupid dicarboxylic acid anhydride of tetrahydrochysene |
Technical process:
(1), the preparatory stage:
Check that the vacuum pouring system has or not gas leakage, whether various instrumentations are normal, and whether pipeline is unimpeded, notify the relevant personnel at once and keep in repair if pinpoint the problems.
If ambient temperature is low to cause the viscosity of raw material bigger, mobile when relatively poor, use the back of can liquefying under 40 ℃ environment.
The vacuum pouring jar is preheating to 75 ℃, and mixing tank is preheating to 45 ℃;
The transformer coil mold work car of needs cast is advanced in the vacuum pouring jar, getting 110 ℃ transparent heat resistant plastic pipe receives on the cast valve and with pipe collar and locks, sebific duct puts in the pour mass apart from about the about 100mm in bottom, and with binding strap gate spool is fixed on the casting mold, check and close the pouring can door after errorless.
(2), batch mixing and vacuum degassing stage:
Successively mixing in epoxy resin 100 weight portions and the epoxy curing agent 100 weight portions adding mixing tank;
Open the heat conduction circulation valve, start heater, agitating device successively.
Mixing tank is heated to 60 ℃, more than vacuum degree 5mbar, stirs degassing 5h, do not have bubble with material surface and be as the criterion.
(3), the vacuum pouring stage:
Open the heat conduction valve, start heating system;
The vacuum pouring jar is heated to 70 ℃, keeps beginning to vacuumize after 1 hour, more than vacuum degree 5mbar, keep 5h;
Slowly open the cast valve, control solation speed will notice in this process whether mould has the glue of leakage phenomenon, find to leak glue and in time stop cast, remove the pouring can vacuum, after opening the pouring can door and handling, again vacuumize and reach the process stipulation value, pour into a mould again.
Coil top is closed the cast valve and is observed the liquid level position situation after seeing glue, pours into a mould according to liquid level decision whether continuing to open cast valve.When liquid level reaches apart from mold height 20mm, stop cast, and under vacuum state, left standstill 15 minutes.
Leave standstill and finish slowly releasing vacuum of back.Open the pouring can door after removing vacuum, fall the situation after-teeming after rise to the above-mentioned requirements height, release the work car, change curing oven over to and be cured processing according to liquid level.
(4), reprocessing:
After pouring, should as early as possible remaining compound be emitted.Acetone with capacity cleans running gate system twice.Attention: when cleaning mixing tank, must be noted that the temperature of mixing tank can not be above 40 ℃ with acetone.No burning during cleaning.After if running gate system is cleaned, unused time surpasses 72 hours, must clean again before cast, and allow pipeline re-use after the intensive drying under natural environment.
Embodiment 3
Raw material:
| Raw material | Manufacturer | Model | Composition |
| Epoxy resin | The Jiaxing City factory that orientalizes | ??GE9305F | Bisphenol A epoxide resin |
| Epoxy curing agent | The Jiaxing City factory that orientalizes | ??GH9305F | The adjacent stupid dicarboxylic acid anhydride of tetrahydrochysene |
Technical process:
(1), the preparatory stage:
Check that the vacuum pouring system has or not gas leakage, whether various instrumentations are normal, and whether pipeline is unimpeded, notify the relevant personnel at once and keep in repair if pinpoint the problems.
If ambient temperature is low to cause the viscosity of raw material bigger, mobile when relatively poor, use the back of can liquefying under 30 ℃ environment.
The vacuum pouring jar is preheating to 65 ℃, and mixing tank is preheating to 35 ℃;
The transformer coil mold work car of needs cast is advanced in the vacuum pouring jar, getting 120 ℃ transparent heat resistant plastic pipe receives on the cast valve and with pipe collar and locks, sebific duct puts in the pour mass apart from about the about 200mm in bottom, and with binding strap gate spool is fixed on the casting mold, check and close the pouring can door after errorless.
(2), batch mixing and vacuum degassing stage:
Successively mixing in epoxy resin 100 weight portions and the epoxy curing agent 100 weight portions adding mixing tank;
Open the heat conduction circulation valve, start heater, agitating device successively.
Mixing tank is heated to 60 ℃, more than vacuum degree 5mbar, stirs degassing 4h, do not have bubble with material surface and be as the criterion.
(3), the vacuum pouring stage:
Open the heat conduction valve, start heating system;
The vacuum pouring jar is heated to 70 ℃, keeps beginning to vacuumize after 1 hour, more than vacuum degree 5mbar, keep 4h;
Slowly open the cast valve, control solation speed will notice in this process whether mould has the glue of leakage phenomenon, find to leak glue and in time stop cast, remove the pouring can vacuum, after opening the pouring can door and handling, again vacuumize and reach the process stipulation value, pour into a mould again.
Coil top is closed the cast valve and is observed the liquid level position situation after seeing glue, pours into a mould according to liquid level decision whether continuing to open cast valve.When liquid level reaches apart from mold height 20mm, stop cast, and under vacuum state, left standstill 12 minutes.
Leave standstill and finish slowly releasing vacuum of back.Open the pouring can door after removing vacuum, fall the situation after-teeming after rise to the above-mentioned requirements height, release the work car, change curing oven over to and be cured processing according to liquid level.
(4), reprocessing:
After pouring, should as early as possible remaining compound be emitted.Acetone with capacity cleans running gate system twice.Attention: when cleaning mixing tank, must be noted that the temperature of mixing tank can not be above 40 ℃ with acetone.No burning during cleaning.After if running gate system is cleaned, unused time surpasses 72 hours, must clean again before cast, and allow pipeline re-use after the intensive drying under natural environment.
Traditional vacuum casting method and vacuum casting method of the present invention are compared as follows:
| Traditional vacuum casting method | Vacuum casting method of the present invention | |
| ??1 | Vacuum degree, temperature, time there is not concrete regulation | Vacuum degree, temperature, time had quantize regulation |
| ??2 | Casting process is wayward | Can implementation procedure control |
| ??3 | Be easy to generate bubble | Be difficult for producing bubble |
| ??4 | Be easy to generate defective | Be difficult for producing defective |
| ??5 | Material consumption is bigger | Material consumption is less |
Claims (1)
1. a vacuum casting method for epoxy resin is characterized in that, concrete steps are:
The first step, the vacuum pouring jar is preheating to 70 ± 5 ℃, mixing tank is preheating to 40 ± 5 ℃; The work car that is loaded with transformer coil mould to be cast is advanced in the vacuum pouring jar, one end of 〉=100 ℃ transparent heat resistant plastic pipes is linked to each other with cast valve in the vacuum pouring jar, the other end reaches the interior position apart from bottom 100-200mm of transformer coil mould to be cast, closes vacuum pouring jar door;
Second step, epoxy resin 100 weight portions and epoxy curing agent 100 weight portions are added in the mixing tank mix successively, mixing tank is heated to 60 ℃, more than vacuum degree 5mbar, stir degassing 3-5h;
The 3rd the step, the vacuum pouring jar is heated to 70 ℃, keep beginning to vacuumize after 1 hour, more than vacuum degree 5mbar, keep 3-5h, the casting epoxy resin mixture arrives the height apart from die tip 20mm up to liquid level, left standstill 10-15 minute, remove vacuum, fall situation after-teeming epoxy resin composition after rise to above-mentioned liquid level according to liquid level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010146764 CN101826393A (en) | 2010-04-15 | 2010-04-15 | Vacuum pouring method for epoxy resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010146764 CN101826393A (en) | 2010-04-15 | 2010-04-15 | Vacuum pouring method for epoxy resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101826393A true CN101826393A (en) | 2010-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010146764 Pending CN101826393A (en) | 2010-04-15 | 2010-04-15 | Vacuum pouring method for epoxy resin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101826393A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468373A (en) * | 2010-11-10 | 2012-05-23 | 詹国光 | Manufacturing method for cover plate, and method for manufacturing packaged light-emitting diode by using cover plate |
| CN102529124A (en) * | 2012-01-14 | 2012-07-04 | 迪皮埃复材构件（太仓）有限公司 | Mixed resin vacuum defoaming/degassing system for preparing wind power generation blade, and vacuum defoaming/degassing method thereof |
| CN102592820A (en) * | 2012-03-28 | 2012-07-18 | 江苏中容科技有限公司 | One-step forming process of cast coil of dry type transformer |
| CN102679720A (en) * | 2012-05-13 | 2012-09-19 | 江苏有能电力自动化有限公司 | Sintering furnace of capacitive transformer coil |
| CN103187164A (en) * | 2011-12-30 | 2013-07-03 | 洛阳恒光特种变压器有限公司 | Vacuum and pressure pouring method for reducing local discharge of dry-type transformer |
| CN103909597A (en) * | 2013-12-06 | 2014-07-09 | 南阳防爆集团股份有限公司 | Low-temperature pouring and insulating method of magnetic confinement balance bed |
| CN104750142A (en) * | 2015-04-15 | 2015-07-01 | 张金木 | Resin vacuum degassing secondary mixed material temperature and pressure control system |
| CN105448469A (en) * | 2015-12-10 | 2016-03-30 | 广东新昇电业科技股份有限公司 | Epoxy potting inductor and fabrication method thereof |
| CN106384664A (en) * | 2016-11-25 | 2017-02-08 | 中国科学院电工研究所 | Vacuum centrifugal impregnation device |
| CN107561337A (en) * | 2017-09-01 | 2018-01-09 | 全球能源互联网研究院 | The preparation method of optical fiber current mutual inductor and its prepared optical fiber current mutual inductor |
| CN108962585A (en) * | 2018-07-19 | 2018-12-07 | 德阳新源电器有限责任公司 | A kind of continuous disk-type winding pouring technology |
| CN114093653A (en) * | 2021-11-30 | 2022-02-25 | 广东广特电气股份有限公司 | Epoxy resin pouring preparation method for dry-type transformer coil |
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| JP2004134707A (en) * | 2002-10-15 | 2004-04-30 | Hitachi Industrial Equipment Systems Co Ltd | Resin mold coil, mold transformer using the same, and method for manufacturing the mold transformer |
| CN1741210A (en) * | 2005-09-05 | 2006-03-01 | 韶关市韶特电气有限公司 | Dry type electric transformer teeming epoxy resin coil non-cutting technology |
| CN101112779A (en) * | 2006-07-28 | 2008-01-30 | 西安西电变压器有限责任公司 | High-pressure high-capacity reactor iron core cake casting technics |
| CN101439567A (en) * | 2008-12-25 | 2009-05-27 | 麦克奥迪（厦门）电气有限公司 | Vacuum pressure pouring process for epoxy resins insulation pouring piece of high voltage electric appliance |
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2010
- 2010-04-15 CN CN 201010146764 patent/CN101826393A/en active Pending
Patent Citations (4)
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| JP2004134707A (en) * | 2002-10-15 | 2004-04-30 | Hitachi Industrial Equipment Systems Co Ltd | Resin mold coil, mold transformer using the same, and method for manufacturing the mold transformer |
| CN1741210A (en) * | 2005-09-05 | 2006-03-01 | 韶关市韶特电气有限公司 | Dry type electric transformer teeming epoxy resin coil non-cutting technology |
| CN101112779A (en) * | 2006-07-28 | 2008-01-30 | 西安西电变压器有限责任公司 | High-pressure high-capacity reactor iron core cake casting technics |
| CN101439567A (en) * | 2008-12-25 | 2009-05-27 | 麦克奥迪（厦门）电气有限公司 | Vacuum pressure pouring process for epoxy resins insulation pouring piece of high voltage electric appliance |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468373A (en) * | 2010-11-10 | 2012-05-23 | 詹国光 | Manufacturing method for cover plate, and method for manufacturing packaged light-emitting diode by using cover plate |
| CN103187164A (en) * | 2011-12-30 | 2013-07-03 | 洛阳恒光特种变压器有限公司 | Vacuum and pressure pouring method for reducing local discharge of dry-type transformer |
| CN102529124A (en) * | 2012-01-14 | 2012-07-04 | 迪皮埃复材构件（太仓）有限公司 | Mixed resin vacuum defoaming/degassing system for preparing wind power generation blade, and vacuum defoaming/degassing method thereof |
| CN102592820A (en) * | 2012-03-28 | 2012-07-18 | 江苏中容科技有限公司 | One-step forming process of cast coil of dry type transformer |
| CN102679720A (en) * | 2012-05-13 | 2012-09-19 | 江苏有能电力自动化有限公司 | Sintering furnace of capacitive transformer coil |
| CN103909597A (en) * | 2013-12-06 | 2014-07-09 | 南阳防爆集团股份有限公司 | Low-temperature pouring and insulating method of magnetic confinement balance bed |
| CN104750142A (en) * | 2015-04-15 | 2015-07-01 | 张金木 | Resin vacuum degassing secondary mixed material temperature and pressure control system |
| CN105448469A (en) * | 2015-12-10 | 2016-03-30 | 广东新昇电业科技股份有限公司 | Epoxy potting inductor and fabrication method thereof |
| CN106384664A (en) * | 2016-11-25 | 2017-02-08 | 中国科学院电工研究所 | Vacuum centrifugal impregnation device |
| CN107561337A (en) * | 2017-09-01 | 2018-01-09 | 全球能源互联网研究院 | The preparation method of optical fiber current mutual inductor and its prepared optical fiber current mutual inductor |
| CN108962585A (en) * | 2018-07-19 | 2018-12-07 | 德阳新源电器有限责任公司 | A kind of continuous disk-type winding pouring technology |
| CN114093653A (en) * | 2021-11-30 | 2022-02-25 | 广东广特电气股份有限公司 | Epoxy resin pouring preparation method for dry-type transformer coil |
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Open date: 20100908 |