CN112847999A - Dynamic pouring process of epoxy resin basin-type insulator - Google Patents
Dynamic pouring process of epoxy resin basin-type insulator Download PDFInfo
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- CN112847999A CN112847999A CN202110016725.XA CN202110016725A CN112847999A CN 112847999 A CN112847999 A CN 112847999A CN 202110016725 A CN202110016725 A CN 202110016725A CN 112847999 A CN112847999 A CN 112847999A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/003—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/42—Casting under special conditions, e.g. vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
Abstract
The invention discloses a dynamic pouring process of an epoxy resin basin-type insulator, which relates to the technical field of insulator pouring and comprises the following steps of raw material pretreatment, material mixing, embedding, pouring, curing and demolding, wherein epoxy resin is heated for a certain time at a certain temperature, and water, gas and low-molecular volatile matters adsorbed in the raw materials are removed through a vacuum treatment device, so that the effects of degassing and dewatering are achieved. According to the invention, the epoxy resin raw material is treated at the pouring money, so that the moisture gas and low-molecular volatile matters in the epoxy resin raw material are removed, the raw material is prevented from generating bubbles during pouring, meanwhile, the mixed material is poured in the vacuum pouring tank in a sealing manner, the temperature of the mold in the vacuum pouring tank is kept consistent with the temperature of the mixed material, and the cold and hot temperature difference during pouring of the mixed material is prevented, so that the situations of sink marks and bubbles during pouring are avoided, thereby improving the pouring quality of the insulator and further ensuring the electrical performance of the insulator.
Description
Technical Field
The invention relates to the technical field of insulator pouring, in particular to a dynamic pouring process of an epoxy resin basin-type insulator.
Background
With the continuous implementation of the strategy of 'developing extra-high voltage transmission and optimizing power layout' in China and the continuous promotion of the projects of 'four-phase-direct' and 'five-phase-eight-direct' of the national grid company, the method marks that the extra-high voltage transmission and transformation in China enters a high-speed development stage, and has a wide development prospect. Gas insulated metal enclosed switchgear (GIS) is a key device in extra-high voltage transmission, and a basin-type insulator is an important insulating part in the GIS. The basin-type insulator not only has excellent insulating property, but also has higher mechanical property, SF6 gas corrosion resistance and other properties.
The existing epoxy resin insulating part is complex in production process, easy epoxy resin generates sink marks and bubbles easily during pouring, so that the epoxy resin layer cracks, the electrical performance of the insulator is directly affected, the insulator needs to be cured for multiple times, the curing process is long, and the working efficiency is affected.
Disclosure of Invention
The invention aims to provide a dynamic pouring process of an epoxy resin basin-type insulator, which aims to solve the problems that the existing epoxy resin insulator in the background art is relatively complex in production process, epoxy resin is easy to produce sink marks and bubbles during pouring, so that the epoxy resin layer cracks and directly affects the electrical performance of the insulator, the insulator needs to be cured for multiple times, the curing process is relatively long, and the working efficiency is affected
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a dynamic pouring process of an epoxy resin basin-type insulator is characterized by comprising the following steps:
s4): the raw material is pretreated, the epoxy resin is heated for a certain time at a certain temperature, and water, gas and low-molecular volatile matters adsorbed in the raw material are removed through a vacuum treatment device, so that the degassing and dehydration effects are achieved;
s2): mixing materials, namely mixing epoxy resin, filler and a curing agent;
s3): the insert is used for placing the mould in a vacuum casting tank;
s4): pouring, namely pouring the mixed material into a mold in a vacuum pouring tank;
s5): curing, namely converting the hot fluid state of the mixed material in the mold into a hot solid state;
s6): and (4) demolding, and taking the solidified mixed material in the hot solid state out of the mold.
Preferably, the epoxy resin is heated and melted, then mixed with the filler for the first time, the epoxy resin is enabled to fully wet the filler, and after the first mixing is completed, the curing agent is added for the second mixing, so that the curing agent and the filler are fully and uniformly mixed, and thus the mixed material is obtained.
Preferably, the basin-type insulator is placed into a vacuum casting tank and is fixed, the vacuum casting tank is preheated, the preheating temperature is not lower than the temperature of the mixed material, the vacuum casting tank is subjected to vacuum treatment, air is extracted from the vacuum casting tank through a vacuum device, the vacuum degree value of the vacuum casting tank is guaranteed to be below 1200pa, the temperature inside the vacuum casting tank is kept consistent with the temperature of the mixed material, and the vacuum casting tank is continuously vacuumized for a period of time after casting is completed so as to remove bubbles formed in a casting piece.
Preferably, the curing is carried out in two stages, the first stage is used for heating and curing the mixed material, the curing time is 30-60 minutes, the curing temperature is 80-120 degrees, the mixed material after the first curing is finished is subjected to second curing, the curing time is 2-10 hours, and the curing temperature is 90-160 degrees.
Preferably, the temperature of the mould in the vacuum casting tank is reduced to be lower than 80 ℃ during demoulding.
Preferably, the curing agent is one of aliphatic amine, aromatic amine, polyamide, phthalic anhydride, maleic anhydride and amino resin.
Preferably, the filler is a heat conductive material, and the filler is one of silica, calcium carbonate, alumina, quartz powder and iron powder.
Compared with the prior art, the invention provides a dynamic casting process of an epoxy resin basin-type insulator, which has the following beneficial effects:
1. according to the invention, the epoxy resin raw material is treated at the pouring money, so that the moisture gas and low-molecular volatile matters in the epoxy resin raw material are removed, the raw material is prevented from generating bubbles during pouring, meanwhile, the mixed material is poured in the vacuum pouring tank in a sealing manner, the temperature of the mold in the vacuum pouring tank is kept consistent with the temperature of the mixed material, and the cold and hot temperature difference during pouring of the mixed material is prevented, so that the situations of sink marks and bubbles during pouring are avoided, thereby improving the pouring quality of the insulator and further ensuring the electrical performance of the insulator.
2. This emergence is selected the filler from heat-conducting material and is mixed with epoxy, has increased epoxy's heat conductivility to reduce the required time of curing by heating, simultaneously with a plurality of curing process originally, design for once curing, go on curing process two stages once more, not only improved curing effect and reduced epoxy's curing time, thereby improved production efficiency.
Drawings
FIG. 1 is a flow chart of a dynamic casting process of an epoxy resin basin-type insulator according to the present invention;
Detailed Description
The following description is provided to disclose the invention so as to enable one skilled in the art to practice the invention, and the preferred embodiments are provided by way of example only, and other obvious variations will be apparent to those skilled in the art.
Example 1
Referring to fig. 1, a dynamic casting process of an epoxy resin basin-type insulator is characterized by comprising the following steps:
s4): the raw material is pretreated, the epoxy resin is heated for a certain time at a certain temperature, and water, gas and low-molecular volatile matters adsorbed in the raw material are removed through a vacuum treatment device, so that the degassing and dehydration effects are achieved;
s2): mixing materials, namely mixing epoxy resin, filler and a curing agent;
s3): the insert is used for placing the mould in a vacuum casting tank;
s4): pouring, namely pouring the mixed material into a mold in a vacuum pouring tank;
s5): curing, namely converting the hot fluid state of the mixed material in the mold into a hot solid state;
s6): and (4) demolding, and taking the solidified mixed material in the hot solid state out of the mold.
The epoxy resin is heated and melted and then mixed with the aromatic amine for the first time, the epoxy resin is enabled to fully wet the aromatic amine, the filler is selected from aromatic amine heat-conducting materials and is mixed with the epoxy resin, the heat conducting capacity of the epoxy resin is improved, the time required by heating and curing is reduced, the silicon dioxide is added after the first mixing is finished and is mixed for the second time, the silicon dioxide and the silicon dioxide are fully and uniformly mixed, the silicon dioxide and the epoxy resin are subjected to chemical reaction to form a net-shaped three-dimensional polymer, and the composite material aggregate is enveloped in a net-shaped body, so that the mixed material is obtained.
The basin type insulator is placed into a vacuum casting tank and is fixed, the vacuum casting tank is preheated, the preheating temperature is not lower than the temperature of the mixed material, the mixed material is prevented from generating cold and hot temperature difference when being cast, the condition of sink marks generated when being cast is avoided, the vacuum casting tank is subjected to vacuum treatment, the vacuum casting tank is subjected to air extraction through a vacuum device, the vacuum degree value of the vacuum casting tank is ensured to be below 1200pa, the vacuum casting tank is ensured to be in a vacuum state, the temperature inside the vacuum casting tank is kept consistent with the temperature of the mixed material, the vacuum casting tank is continuously vacuumized for a period after the casting is completed, bubbles formed in a casting piece are removed, the vacuum coke main pipe is subjected to vacuum treatment, and the epoxy resin is prevented from being generated when being cast.
The curing is carried out in two stages, the first stage carries out heating curing on the mixed material, the curing time is 30-60 minutes, the curing temperature is 90 degrees, the mixed material after the first stage curing is carried out in the second stage curing, the curing time is 2-10 hours, the curing temperature is 100 degrees, the curing process and the curing time are reduced, and through one-step sectional curing, the curing effect is improved, and the curing time of the epoxy resin is reduced.
During demoulding, the temperature of the mould in the vacuum casting tank is reduced to be lower than 80 ℃, the cooling mode is generally carried out in a water cooling mode, the internal stress between the epoxy resin and the mould is reduced through cooling, and the insulator is easily demoulded.
Example 2
Referring to fig. 1, a dynamic casting process of an epoxy resin basin-type insulator is characterized by comprising the following steps:
s4): the raw material is pretreated, the epoxy resin is heated for a certain time at a certain temperature, and water, gas and low-molecular volatile matters adsorbed in the raw material are removed through a vacuum treatment device, so that the degassing and dehydration effects are achieved;
s2): mixing materials, namely mixing epoxy resin, filler and a curing agent;
s3): the insert is used for placing the mould in a vacuum casting tank;
s4): pouring, namely pouring the mixed material into a mold in a vacuum pouring tank;
s5): curing, namely converting the hot fluid state of the mixed material in the mold into a hot solid state;
s6): and (4) demolding, and taking the solidified mixed material in the hot solid state out of the mold.
The epoxy resin is heated and melted and then is mixed with phthalic acid for the first time, the epoxy resin is enabled to fully wet the phthalic acid, the filler is selected from phthalic acid heat-conducting materials and is mixed with the epoxy resin, the heat conducting capacity of the epoxy resin is increased, the time required by heating and curing is reduced, silicon dioxide is added for the second time after the first time of mixing is completed, calcium carbonate and the epoxy resin are fully and uniformly mixed, the calcium carbonate and the epoxy resin are subjected to chemical reaction to form a net-shaped three-dimensional polymer, and the composite material aggregate is enveloped in a net-shaped body, so that a mixed material is obtained.
The basin type insulator is placed into a vacuum casting tank and is fixed, the vacuum casting tank is preheated, the preheating temperature is not lower than the temperature of the mixed material, the mixed material is prevented from generating cold and hot temperature difference when being cast, the condition of sink marks generated when being cast is avoided, the vacuum casting tank is subjected to vacuum treatment, the vacuum casting tank is subjected to air extraction through a vacuum device, the vacuum degree value of the vacuum casting tank is ensured to be below 1200pa, the vacuum casting tank is ensured to be in a vacuum state, the temperature inside the vacuum casting tank is kept consistent with the temperature of the mixed material, the vacuum casting tank is continuously vacuumized for a period after the casting is completed, bubbles formed in a casting piece are removed, the vacuum coke main pipe is subjected to vacuum treatment, and the epoxy resin is prevented from being generated when being cast.
The curing is carried out in two stages, the first stage carries out heating curing on the mixed material, the curing time is 30-60 minutes, the curing temperature is 100 degrees, the mixed material after the first stage curing is carried out the second stage curing, the curing time is 2-10 hours, the curing temperature is 120 degrees, the curing process and the curing time are reduced, and through one-step sectional type curing, the curing effect is improved, and the curing time of the epoxy resin is reduced.
During demoulding, the temperature of the mould in the vacuum casting tank is reduced to be lower than 80 ℃, the cooling mode is generally carried out in a water cooling mode, the internal stress between the epoxy resin and the mould is reduced through cooling, and the insulator is easily demoulded.
Example 3
Referring to fig. 1, a dynamic casting process of an epoxy resin basin-type insulator is characterized by comprising the following steps:
s4): the raw material is pretreated, the epoxy resin is heated for a certain time at a certain temperature, and water, gas and low-molecular volatile matters adsorbed in the raw material are removed through a vacuum treatment device, so that the degassing and dehydration effects are achieved;
s2): mixing materials, namely mixing epoxy resin, filler and a curing agent;
s3): the insert is used for placing the mould in a vacuum casting tank;
s4): pouring, namely pouring the mixed material into a mold in a vacuum pouring tank;
s5): curing, namely converting the hot fluid state of the mixed material in the mold into a hot solid state;
s6): and (4) demolding, and taking the solidified mixed material in the hot solid state out of the mold.
The epoxy resin is heated and melted and then mixed with the amino resin for the first time, the epoxy resin is enabled to fully wet the aromatic amine, the filler is selected from amino resin heat-conducting materials and is mixed with the epoxy resin, the heat conducting capacity of the epoxy resin is improved, the time required by heating and curing is reduced, the silica is added after the first mixing is finished and is mixed for the second time, the quartz powder and the epoxy resin are fully and uniformly mixed, the quartz powder and the epoxy resin are subjected to chemical reaction to form a net-shaped three-dimensional polymer, and the composite material aggregate is enveloped in a net-shaped body, so that a mixed material is obtained.
The basin type insulator is placed into a vacuum casting tank and is fixed, the vacuum casting tank is preheated, the preheating temperature is not lower than the temperature of the mixed material, the mixed material is prevented from generating cold and hot temperature difference when being cast, the condition of sink marks generated when being cast is avoided, the vacuum casting tank is subjected to vacuum treatment, the vacuum casting tank is subjected to air extraction through a vacuum device, the vacuum degree value of the vacuum casting tank is ensured to be below 1200pa, the vacuum casting tank is ensured to be in a vacuum state, the temperature inside the vacuum casting tank is kept consistent with the temperature of the mixed material, the vacuum casting tank is continuously vacuumized for a period after the casting is completed, bubbles formed in a casting piece are removed, the vacuum coke main pipe is subjected to vacuum treatment, and the epoxy resin is prevented from being generated when being cast.
The curing is carried out in two stages, the first stage is used for heating and curing the mixed material, the curing time is 30-60 minutes, the curing temperature is 100 degrees, the mixed material after the first stage curing is carried out in the second stage curing, the curing time is 2-10 hours, the curing temperature is 140 degrees, the curing process and the curing time are reduced, and through one-step sectional curing, the curing effect is improved, and the curing time of the epoxy resin is reduced.
During demoulding, the temperature of the mould in the vacuum casting tank is reduced to be lower than 80 ℃, the cooling mode is generally carried out in a water cooling mode, the internal stress between the epoxy resin and the mould is reduced through cooling, and the insulator is easily demoulded.
In summary, the invention has the advantages that:
1. according to the invention, the epoxy resin raw material is treated at the pouring money, so that the moisture gas and low-molecular volatile matters in the epoxy resin raw material are removed, the raw material is prevented from generating bubbles during pouring, meanwhile, the mixed material is sealed and poured in the vacuum pouring tank, the temperature of the mold in the vacuum hanging pouring tank is kept consistent with the temperature of the mixed material, and the cold and hot temperature difference during pouring of the mixed material is prevented, so that the situations of sink marks and bubbles during pouring are avoided, thereby improving the pouring quality of the insulator and further ensuring the electrical performance of the insulator.
2. This emergence is selected the filler from heat-conducting material and is mixed with epoxy, has increased epoxy's heat conductivility to reduce the required time of curing by heating, simultaneously with a plurality of curing process originally, design for once curing, go on curing process two stages once more, not only improved curing effect and reduced epoxy's curing time, thereby improved production efficiency.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A dynamic pouring process of an epoxy resin basin-type insulator is characterized by comprising the following steps:
s1): the raw material is pretreated, the epoxy resin is heated for a certain time at a certain temperature, and water, gas and low-molecular volatile matters adsorbed in the raw material are removed through a vacuum treatment device, so that the degassing and dehydration effects are achieved;
s2): mixing materials, namely mixing epoxy resin, filler and a curing agent;
s3): the insert is used for placing the mould in a vacuum casting tank;
s4): pouring, namely pouring the mixed material into a mold in a vacuum pouring tank;
s5): curing, namely converting the hot fluid state of the mixed material in the mold into a hot solid state;
s6): and (4) demolding, and taking the solidified mixed material in the hot solid state out of the mold.
2. The dynamic casting process of an epoxy resin basin-type insulator as claimed in claim 1, wherein: the epoxy resin is heated and melted, then mixed with the filler for the first time, the epoxy resin is enabled to fully wet the filler, and after the first mixing is completed, the curing agent is added for the second mixing, so that the curing agent and the filler are fully and uniformly mixed, and thus the mixed material is obtained.
3. The dynamic casting process of an epoxy resin basin-type insulator as claimed in claim 1, wherein: the basin-type insulator is placed into a vacuum casting tank and is fixed, the vacuum casting tank is preheated, the preheating temperature is not lower than the temperature of mixed materials, the vacuum casting tank is subjected to vacuum treatment, air is extracted from the vacuum casting tank through a vacuum device, the vacuum degree value of the vacuum casting tank is guaranteed to be below 1200pa, the temperature inside the vacuum casting tank is kept consistent with the temperature of the mixed materials, and the vacuum casting tank is continuously vacuumized for a period of time after casting is completed so as to remove bubbles formed in a casting piece.
4. The dynamic casting process of an epoxy resin basin-type insulator as claimed in claim 1, wherein: the curing is carried out in two stages, the first stage is used for heating and curing the mixed material, the curing time is 30-60 minutes, the curing temperature is 80-120 degrees, the mixed material after the first curing is carried out is subjected to second curing, the curing time is 2-10 hours, and the curing temperature is 90-160 degrees.
5. The dynamic casting process of an epoxy resin basin-type insulator as claimed in claim 1, wherein: and during demolding, the temperature of the mold in the vacuum casting tank is reduced to be lower than 80 ℃.
6. The dynamic casting process of an epoxy resin basin-type insulator as claimed in claim 1, wherein: the curing agent is one of aliphatic amine, aromatic amine, polyamide, phthalic anhydride, maleic anhydride and amino resin.
7. The dynamic casting process of an epoxy resin basin-type insulator as claimed in claim 1, wherein: the filler is a heat-conducting material and is one of silicon dioxide, calcium carbonate, alumina, quartz powder and iron powder.
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| CN202110016725.XA CN112847999A (en) | 2021-01-07 | 2021-01-07 | Dynamic pouring process of epoxy resin basin-type insulator |
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| CN202110016725.XA CN112847999A (en) | 2021-01-07 | 2021-01-07 | Dynamic pouring process of epoxy resin basin-type insulator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113459364A (en) * | 2021-07-30 | 2021-10-01 | 中航电测仪器(西安)有限公司 | PDU module glue filling method and glue filling mold |
| CN114102938A (en) * | 2021-11-16 | 2022-03-01 | 贵州电网有限责任公司 | Method for rapid modeling and repairing damage of porcelain insulator of power equipment |
| CN115008657A (en) * | 2022-06-15 | 2022-09-06 | 山东达驰高压开关有限公司 | Novel epoxy resin pouring method for basin-type insulator |
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| CN115008657B (en) * | 2022-06-15 | 2023-12-29 | 山东达驰高压开关有限公司 | Novel epoxy resin pouring method for basin-type insulator |
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Application publication date: 20210528 |