CN104772832B - Epoxide resin vacuum mixing speed control system - Google Patents
Epoxide resin vacuum mixing speed control system Download PDFInfo
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- CN104772832B CN104772832B CN201510176258.1A CN201510176258A CN104772832B CN 104772832 B CN104772832 B CN 104772832B CN 201510176258 A CN201510176258 A CN 201510176258A CN 104772832 B CN104772832 B CN 104772832B
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Abstract
The present invention relates to epoxide resin vacuum mixing speed control systems, for when changing mixture of epoxy resins formula or vacuumizing operating condition, the vacuum defoamation effect for detecting its mixture mixing speed set under each specific temperature (viscosity) by comparing obtaining there is the temperature (viscosity) of best deaeration efficiency to cooperate with mixing speed.
Description
(1) technical field:
The present invention relates to epoxide resin vacuum mixing speed control system, for when change mixture of epoxy resins formula or
When vacuumizing operating condition, the vacuum defoamation effect of its mixture mixing speed set under each specific temperature (viscosity) is detected,
By comparing obtaining there is the temperature (viscosity) of best deaeration efficiency to cooperate with mixing speed.
(2) background technique:
Epoxy resin oxygen material prescription designs flexible and various, obtains it extensively in fields such as electric power, electronic apparatus
Using the especially Embedding Material of the mould material of the electric appliances such as electric power mutual-inductor, transformer, insulator and electronic device works as ring
When oxygen resin is applied to high voltage electric appliance, it is desired to which it has extremely low partial discharge quantity, otherwise will be due to partial discharge quantity is exceeded
Premature aging, electric leakage even puncture initiation accident.Stomata in epoxide resin material is the main original for generating shelf depreciation
Cause, therefore in poured with epoxy resin, it is gentle to be all made of the air gap that vacuum pouring deaeration technology is reduced in cast product as far as possible
Bubble.
Based on gas solubility principle relevant to fluid temperature and pressure in a liquid, in high viscosity liquid de-aeration
It is middle using it is more be to be stirred under vacuum the methods of deaeration and vacuum film deaeration.
Typical technique is that the fillers such as resin, curing agent and silicon emblem powder, mill base are calculated each component weight according to the ratio, is claimed
Preheat 60 DEG C/3~4h after weight in an oven in advance, mixing divides firsts and seconds mixing.First start storing in second level mixing
The heating system and vacuum system of tank A, storage tank B.Resin, filler after preheating, and past storage tank B is added toward storage tank A again
Storage tank A whipping temp is set as 55 DEG C, stirred 3~4 hours, by storage tank B by the middle curing agent being added after preheating, filler
Whipping temp is set as 50 DEG C, stirs 3~4 hours.Then stirring is vacuumized to storage tank A, storage tank B, vacuum degree is set as
4mbar.After above-mentioned vacuum outgas, after then mixing stirring vacuumizes again in mixing tank, mixing is imported in pouring can and is poured
It is demoulded after infusing cured furnace heating cure again.
(3) summary of the invention:
Gas also has certain solubility to high-viscosity epoxy resin mixture liquid in air, but in mixture
Liquid depths bubble size very little exists usually in the form of microbubble, and microbubble is extremely by the speed that natural buoyancy rises
Slowly, it is necessary to take bubble to liquid level by external force, therefore more effective deaeration mode is de- using being stirred under vacuum at present
The methods of bubble and vacuum film deaeration.
Due to liquid-state epoxy resin mixture each composition material and its proportion it is different, it is also possible to due to asphalt mixtures modified by epoxy resin
Rouge, curing agent inherent quality problem, cause the gel time of every batch of mixture inconsistent, and used vacuum deaerator plant
Performance and its vacuum stirring deaeration technique of use are widely different, therefore the existing technological parameter setting for being stirred under vacuum deaeration is mostly
Be arranged by rule of thumb or referring to process similarity, specific aim is poor, setting value not with prescription of mixed materials or material manufacturer or
Operating condition changes and rationally changes, and influences deaeration effect and product quality.The present invention introduces the control of epoxide resin vacuum mixing speed
System, when changing mixture of epoxy resins formula or factory or vacuumizing operating condition, for redefining technological parameter, two
Grade mixing system in storage tank A be an epoxy resin, filler mixture degassing system, it is characterized in that when change prescription of mixed materials or
When vacuumizing operating condition, pass through its mixture of on-site test storage tank A mixing speed set under each specific temperature (viscosity)
Vacuum stirring deaeration effect, obtain by comparing under each specific temperature (viscosity) according to deaeration efficiency temperature (viscosity) with stir
Speed is mixed rationally to cooperate.To not influence the mixing speed setting that production amendment is usually run.
Its thinner mixture viscosity of the more granularities of the loading of filler increases more in mixture of epoxy resins.Another party
Face, after rising to nearly liquid level due to bubble, bubble can not escape at once, but under the action of pressure difference, bubble continues to expand,
And stay for some time under nearly liquid level, after shaking off liquid level tension, it could escape or rupture, the residence time is with pressure, mixed
Feed liquid body viscosity reduction and shorten.
Bubble escapes efficiency and the mixing speed of blender is closely related, when many bubbles in different stages of growth go out
Now, excessively high mixing speed will make a part of bubble have little time sufficient growth rupture and evolution and be brought back mixing liquid depth
Place, too low mixing speed make bubble take the extension of liquid level time to, shorten effective inclined heated plate.Due to different temperature and mix
Material viscosity is closed, makes number of bubbles and speed of growth difference in different stages of growth, therefore mixing speed selection is different, makes to locate
Change in effective conevying efficiency that the bubble of different growing stages transports liquid level and is escaped with the difference of temperature and viscosity.
System reflects that bubble escapes efficiency in mixture of epoxy resins using the variation of vacuum degree, viscous in a certain reflection
It spends under the set temperature of variation, by starting vacuum pump, detects vacuum degree from preset lower limit and reach upper limit value (low pressure limit
Value) time, lower deaeration efficiency be set and compared by repeatedly production detection for optimizing stirring to be reflected in the mixing speed
The setting of speed.
The epoxide resin vacuum mixing speed control system when the system is operated first calculates resin, filler according to the ratio
Each component weight out, after weighing by original process requirement in advance in baking oven or hot-blast stove carry out preheating and drying processing after it is spare.So
Start the heating system and vacuum system of storage tank A afterwards.Epoxy resin after preheated drying process is first put into storage tank A,
It puts at a temperature of silicon powder is cooled to beginning and heats up again, can be stirred under vacuum after beginning temperature, that is, epoxy resin melting
Temperature, such as heat up in 40 DEG C to 55 DEG C or so beginning stageds, first stirring 5~15 minutes makes mixing uniformly be then turned on vacuum
Pump, and vacuum degree is set in a upper and lower limits, such as it can be pressed to the original process setting value of vacuum degree as under pressure
Limit value, and take vacuum degree decline (pressure rising) to low pressure limit value that 6-15% is added to reflect vacuum degree as upper limit value
Pressure signal send master controller to handle, and the working signal for opening or closing vacuum pump is issued by master controller.Master controller
Heating control uses staged heating mode, every time desirable 3-8 DEG C or so of identical warming room every.Its terminal temperature is a little higher than mixed
Batch can set temperature, such as 75 DEG C -90 DEG C or so, it is desired to the power that heats up is big, speed is fast and evacuation rate is fast.Blender
Mixing speed according to the staged heating mode temperature sections at different levels using successively decreasing, i.e., maximum temperature is stirred using what original process determined
It mixes speed and fits its mixing speed at different levels mutually with bubble evolution speed to low lapse of temperature, and through the comparison of multiple production effect
It answers.Storage tank A first heats up at a temperature of beginning when system works and opening vacuum pump and vacuumizing makes vacuum degree reach setting pressure
Lower limit value simultaneously closes vacuum pump and valve when reaching relevant temperature section set temperature, when vacuum degree drops to setting upper pressure limit value
When make that several seconds delay opens valve after eliminating excessive bubble again and vacuum pump vacuumizes while starting the rising timer of vacuum degree,
So that vacuum degree is reached setting low pressure limit value timing terminates to enter next section, so in cycles, it is sequentially recorded each vacuum degree
Rising timer timing time, rise timer when the time through multiple comparision of production reflection mixing speed setting to take out it is true
The influence of empty performance, the rising timer timing time length of more each vacuum degree, determines that the vacuum of its set temperature point is stirred
Deaeration effect is mixed, to determine its mixing speed to obtain the setting of the mixing speed under each temperature-viscosity, then arrives terminal temperature
Stop heating afterwards and constant-temperature vacuum stirs deaeration under the desired temperature and its activity time that original process require, later again by original
Technique requires to be poured, solidified and demoulded.
It usually produces and does not make the detection, when temperature rises to original process desired temperature, by the determining temperature of original process
Degree setting value modifies its mixing speed temperature-constant operation, remaining presses the temperature range that original process determine, takes the temperature within the scope of its
Section is warming up to after this section of desired temperature by the setting of its temperature mixing speed is transferred to next temperature section.Original can be modified when necessary
To increase and decrease the pumpdown time, remaining is operated by original process requirement the temperature range that technique determines.
(4) Detailed description of the invention:
Attached drawing Fig. 1 is the circuit structure block diagram of epoxide resin vacuum mixing speed control system.
(5) specific embodiment:
The circuit structure block diagram of epoxide resin vacuum mixing speed control system is as shown in the picture, it is by temperature sensor
2, master controller 7, pressure sensor 3, pressure transmitter 4, vacuum pump 5, vacuum pump driving circuit 6, stirring motor driving circuit 8
It is formed with storage tank A 1.Wherein master controller 7 is also possible to control cabinet industrial personal computer, realizes function described in master controller 7 as it,
Control cabinet industrial personal computer can realize setting, Centralized Monitoring, major parameter record and operation to a complete set of equipment by configuration software.Pressure
Force snesor 3 is connected with the vacuum chamber of storage tank A 1, and for the vacuum degree of detection system, master controller 7 is driven by vacuum pump
Dynamic circuit 6 opens or closes the vacuum degree that vacuum pump 5 carrys out control system.The signal of pressure sensor 3 send master through pressure transmitter 4
The processing of controller 7,7 circuit of master controller are used for the vacuum degree of control system simultaneously.After starting 1 degassing system of storage tank A, such as
Truly the pressure in cavity reaches setting upper limit value, then 7 circuit of master controller will be issued to vacuum pump driving circuit 6 and solenoid valve
Signal, vacuum pump 5 will start immediately.When the pressure in vacuum chamber reaches preset lower limit, 7 circuit of master controller be may turn off
Vacuum pump 5.Mixing speed control is completed by stirring motor driving circuit 8, and speed control signal is provided by master controller 7.
Claims (2)
1. epoxide resin vacuum mixing speed control system is to epoxy resin, fills out using storage tank A in second level mixing procedure
The degassing of mixture is expected, it is characterized in that stirring when changing prescription of mixed materials or vacuumizing operating condition for redefining existing vacuum
The parameter setting of deaeration technique is mixed, that is, redefines the parameter setting of original process, it is stirring set by it by on-site test
The vacuum defoamation effect of speed is mixed, temperature is obtained and rationally cooperates with mixing speed, to not influence what production amendment usually produced
Mixing speed setting；Bubble escapes efficiency and the mixing speed of blender is closely related, when many is in different stages of growth
When bubble occurs, excessively high mixing speed will make a part of bubble have little time adequately to grow rupture and evolution and be brought back mixing
Feed liquid body depths, too low mixing speed make bubble take the extension of liquid level time to, shorten effective inclined heated plate, and through repeatedly raw
Each temperature section that Contrast on effect selection mixing speed and bubble evolution speed are adapted is produced, the mesh of optimization mixing speed setting is reached
, the system reflects that bubble escapes efficiency in mixture of epoxy resins using the variation of vacuum degree, in a certain reflection viscosity
Under the set temperature of variation, by starting vacuum pump, detection vacuum degree reaches the time of upper limit value, Lai Fanying from preset lower limit
The deaeration efficiency under mixing speed setting, the optimization of the mixing speed setting, it is required that under each specific temperature viscosity
Effective inclined heated plate is long, bubble evolution is high-efficient, it is to compare it by the multiple production detection to rise timer constantly
Between i.e. effective inclined heated plate, obtain the reasonable cooperation of the temperature and mixing speed under each specific temperature；
The epoxide resin vacuum mixing speed control system is first put into preheated dry when system operation in storage tank A
Epoxy resin after dry processing, then put at a temperature of silicon powder is cooled to beginning and heat up, after beginning temperature, that is, epoxy resin melting
The temperature being stirred under vacuum, vacuum degree is set in upper and lower limits, using its by vacuum degree original process setting value as
Low pressure limit value, and take vacuum degree to drop to the low pressure limit value and 6-15% is added to reflect the pressure of vacuum degree as upper limit value
Signal send master controller to handle, and the working signal for opening or closing vacuum pump is issued by master controller, the heating of master controller
Control uses staged heating mode, takes 3-8 DEG C of identical warming room every terminal temperature is taken as in a little higher than original process every time
The set temperature of storage tank A, the mixing speed of blender according to the staged heating mode temperature sections at different levels using successively decreasing, i.e.,
Maximum temperature keeps its at different levels using the determining mixing speed of original process and to low lapse of temperature through the comparison of multiple production effect
Mixing speed and bubble evolution speed are adapted, and storage tank A first heats up at a temperature of beginning and opens true when the system works
Empty pumping vacuum makes vacuum degree reach setting low pressure limit value and closes vacuum pump and valve when reaching relevant temperature section set temperature
Door is made to open valve and vacuum pumping again after excessive bubble is eliminated in several seconds delay when vacuum degree drops to setting upper pressure limit value
Vacuum, while starting the rising timer of vacuum degree, so that vacuum degree is reached setting low pressure limit value timing terminates to enter next section,
So in cycles, it is sequentially recorded the rising timer timing time of each vacuum degree, the time is through more when rising timer
The influence to performance is vacuumized is arranged in secondary comparision of production reflection mixing speed, and the rising timer of more each vacuum degree is constantly
Between length, its mixing speed is determined to obtain the setting of the mixing speed under each temperature-viscosity, then to stopping after terminal temperature
It heats up and constant-temperature vacuum stirs deaeration under the desired temperature and its activity time that original process require, wanted again by original process later
It asks and is poured, is solidified and is demoulded, usually produce when temperature rises to original process desired temperature, the temperature determined by original process
Degree setting value modifies temperature-constant operation after its mixing speed, remaining each temperature section presses the temperature range that original process determine, takes its range
The interior temperature section is warming up to after this section of desired temperature by the setting of its temperature mixing speed is transferred to next temperature section.
2. epoxide resin vacuum mixing speed control system according to claim 1, it is characterised in that it includes:
Temperature sensor (2), master controller (7), pressure sensor (3), pressure transmitter (4), vacuum pump (5), vacuum pump drive
Circuit (6), stirring motor driving circuit (8) and storage tank A are moved, wherein the vacuum chamber phase of pressure sensor (3) and storage tank A
Even, for detecting the vacuum degree of the system, master controller (7) opens or closes vacuum pump by vacuum pump driving circuit (6)
(5) vacuum degree of the system is controlled, the signal of pressure sensor (3) send at master controller (7) through pressure transmitter (4)
Reason, master controller (7) circuit are used to control the vacuum degree of the system simultaneously, and mixing speed is controlled by stirring motor driving circuit
(8) it completes, speed control signal is provided by master controller (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510176258.1A CN104772832B (en) | 2015-04-15 | 2015-04-15 | Epoxide resin vacuum mixing speed control system |
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| CN201510176258.1A CN104772832B (en) | 2015-04-15 | 2015-04-15 | Epoxide resin vacuum mixing speed control system |
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| CN104772832B true CN104772832B (en) | 2019-04-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109603654A (en) * | 2018-12-06 | 2019-04-12 | 超威电源有限公司 | A kind of epoxide-resin glue agitating device and its stirring means |
| CN112213268B (en) * | 2020-09-29 | 2021-11-09 | 湖北鑫英泰***技术股份有限公司 | Stirring speed control method and device based on oil inlet pressure |
| CN112263849B (en) * | 2020-09-29 | 2021-09-28 | 湖北鑫英泰***技术股份有限公司 | Stirring speed control method and device based on environmental pressure |
| CN112213270B (en) * | 2020-09-29 | 2021-10-19 | 湖北鑫英泰***技术股份有限公司 | Stirring speed control method and device based on viscosity |
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| CN102300689A (en) * | 2009-01-30 | 2011-12-28 | 芬欧汇川有限公司 | Method and apparatus for controlling the quality in the manufacture of composite material |
| CN103056980A (en) * | 2013-01-18 | 2013-04-24 | 广西梧州五一塑料制品有限公司 | Mixed material kneading monitoring device |
| CN103252849A (en) * | 2013-04-16 | 2013-08-21 | 刘汝斌 | Precise epoxy injector |
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|---|---|---|---|---|
| US6143214A (en) * | 1998-03-09 | 2000-11-07 | Board Of Regents Of The University Of Texas System | Mixing and dispensing system for rapidly polymerizing materials |
| AR024361A1 (en) * | 1999-06-15 | 2002-10-02 | Dow Chemical Co | PROCESS AND APPLIANCE TO PREPARE A COMPOSITION USING A CONTINUOUS REACTOR AND SERIES MIXER |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102300689A (en) * | 2009-01-30 | 2011-12-28 | 芬欧汇川有限公司 | Method and apparatus for controlling the quality in the manufacture of composite material |
| CN103056980A (en) * | 2013-01-18 | 2013-04-24 | 广西梧州五一塑料制品有限公司 | Mixed material kneading monitoring device |
| CN103252849A (en) * | 2013-04-16 | 2013-08-21 | 刘汝斌 | Precise epoxy injector |
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Effective date of registration: 20201204 Address after: 215400 room 01, building 13, No.1, Zhaoyan Road, Shaxi Town, Taicang City, Suzhou City, Jiangsu Province Patentee after: Suzhou Xineng Environmental Protection Technology Co.,Ltd. Address before: 350004 8 longevity garden, Yi Chau, Taijiang District, Fujian, Fuzhou 401 Patentee before: Zhang Jinmu |
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