CN111763424A - Converter transformer hot melting support plate and preparation method thereof - Google Patents
Converter transformer hot melting support plate and preparation method thereof Download PDFInfo
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- CN111763424A CN111763424A CN202010654210.8A CN202010654210A CN111763424A CN 111763424 A CN111763424 A CN 111763424A CN 202010654210 A CN202010654210 A CN 202010654210A CN 111763424 A CN111763424 A CN 111763424A
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/06—Coating with compositions not containing macromolecular substances
- C08J7/065—Low-molecular-weight organic substances, e.g. absorption of additives in the surface of the article
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/33—Arrangements for noise damping
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/06—Polyamides derived from polyamines and polycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/08—Cellulose derivatives
- C08J2401/26—Cellulose ethers
- C08J2401/28—Alkyl ethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention discloses a converter transformer hot-melt support plate and a preparation method thereof, wherein the converter transformer hot-melt support plate comprises the following components in parts by weight: 15-20 parts of nylon, 3-8 parts of flame retardant, 2-5 parts of water repellent, 2-8 parts of anti-aging agent, 1-2 parts of antistatic agent and 1-3 parts of low-temperature resistant thickening agent, and the preparation method comprises the following steps: weighing, mixing, filling, pressurizing, cooling, soaking and the like. The invention has the advantages that: the converter transformer hot-melt support plate can automatically fuse and fall off when a converter transformer is in fire, so that the converter transformer is exposed, an external fire-fighting medium can directly act on a fire source conveniently, and damage to equipment and auxiliary facilities in the initial explosion of the converter transformer is reduced.
Description
Technical Field
The invention relates to the field of converter transformer noise reduction devices, in particular to a converter transformer hot-melt support plate and a preparation method thereof.
Background
Converter transformers are one of the most important devices in a converter station and are the most dominant noise source in the station. The converter transformer Box-in noise reduction device is equivalent to the reduction of sound source power from the source, and plays an important role in reaching the standard of the noise of the converter station. However, the Box-in noise reduction device meets the noise reduction requirement, and simultaneously, new problems are generated, for example, when a converter transformer is in a fire, the closed Box-in noise reduction device prevents the fire extinguishing medium from effectively acting on a fire source in the external fire fighting process, especially the blocking of the top Box-in noise reduction device, the external fire fighting efficiency is obviously reduced, the fire is likely to spread and expand, and great equipment damage and economic loss are caused.
At present, the form adopted by the Box-in noise reduction structure of the converter transformer mainly comprises 3 fixed forms, detachable forms and movable forms. Of which the detachable type is most widely used. The detachable Box-in consists of a fixed part and a detachable part, wherein the sound insulation enclosure structure of the fixed part is connected with the firewall and the valve hall wall, the front end of the sound insulation enclosure structure is connected with the Box-in foundation, and the sound insulation enclosure structure does not need to be detached when the converter transformer is replaced. The detachable part is connected with the fixed parts at two ends by steel beams and can be detached when the converter is replaced. A typical converter transformer fire accident shows that the three converter transformer Box-in noise reduction structures cannot automatically fall off under the fire condition, and external fire fighting and fighting are seriously affected. For example, in 2018, when a certain extra-high voltage converter transformer is in fire, the fire can be continuously burnt for more than 20 hours, and serious equipment burning loss is caused. Therefore, need for a neotype supporting plate, when actually making up the device of making an uproar that falls for the board of making an uproar falls in the support, and the automatic fusing of supporting plate drops under the fire condition, and then realizes falling of the board of making an uproar that falls, so that the change of current becomes to expose, and then the external fire-fighting medium direct action in the source of a fire of being convenient for reduces change of current and becomes equipment and the auxiliary facilities of initial stage explosion and damage, provides the advantage for outside fire control is suppressed simultaneously. For example, in the prior art, as disclosed in chinese patent application with publication number CN110180109A, a Box-in device having a sound insulation module and a fire protection module is proposed, wherein a hot-melt material plate is used to support an explosion-venting and dropping sound insulation plate, and in case of fire, the hot-melt material plate can be melted and then dropped to expose a converter transformer.
Disclosure of Invention
The invention aims to provide a converter transformer hot-melting support plate and a preparation method thereof, which can ensure that the converter transformer is hot-melted and dropped off when a fire disaster occurs in the converter transformer while playing a supporting role in a converter transformer noise reduction device so as to expose the converter transformer, reduce the damage of equipment and auxiliary facilities which explode at the initial stage of the converter transformer, and provide favorable conditions for external fire fighting and fighting.
The invention solves the technical problems through the following technical means: a converter hot-melt support plate comprises the following components in parts by weight: 15-20 parts of nylon, 3-8 parts of flame retardant, 2-5 parts of water repellent, 2-8 parts of anti-aging agent, 1-2 parts of antistatic agent and 1-3 parts of low-temperature resistant thickener.
Preferably, the nylon is nylon 66.
Preferably, the flame retardant is silicon dioxide.
Preferably, the water repellent is polysiloxane.
Preferably, the anti-aging agent is one of aluminum oxide, calcium oxide, boron oxide and magnesium oxide.
Preferably, the antistatic agent is one or more of alkyl sulfonic acid, phosphoric acid or dithiocarbamic acid.
Preferably, the low temperature resistant thickening agent is one or more of methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose.
The invention also discloses a preparation method for preparing the converter transformer hot melting support plate, which comprises the following steps:
s1, weighing: weighing 15-20 parts of nylon, 3-8 parts of flame retardant, 2-5 parts of water repellent, 2-8 parts of anti-aging agent, 1-2 parts of antistatic agent and 1-3 parts of low-temperature resistant thickener according to parts by mass;
s2, mixing: sequentially adding the flame retardant, the water repellent, the anti-aging agent and the antistatic agent into a stirrer and uniformly mixing; simultaneously heating the nylon to 250-300 ℃ by a heating device and keeping the temperature for 3-5 minutes to completely melt the nylon; then, the molten nylon and the low-temperature-resistant thickening agent are sequentially added into a stirrer and stirred for 30-60 minutes at the temperature of 250-300 ℃ at the speed of 500-2000 rpm;
s3, filling: pouring the stirred liquid mixture into a prefabricated mold cavity until the mold cavity is completely filled;
s4, pressurization: controlling a top cover of the mold cavity to descend and press the top of the mold cavity through an injection molding machine, then controlling the top cover to move laterally, continuously applying pressure to the liquid mixture, and compacting the liquid mixture;
s5, cooling: cooling the outside of the mold cavity;
s6, soaking: and when the liquid mixture is cooled to a solid mixture at the temperature of 80-100 ℃, completely immersing the solid mixture into a normal-temperature acrylic acid solution with the concentration of 3-15%, and taking out the solid mixture to obtain the conversion heating fusible support plate when the immersion time is more than 12 hours.
Preferably, in step s4, the mold cavity has an opening facing upward, the top cover includes a horizontal frame plate and a lifting plate slidably mounted in the frame plate, and a projection of the lifting plate in the vertical direction is located in the mold cavity opening.
Preferably, the top cover moves laterally when the lifting plate is flush with the bottom of the frame plate.
The invention has the advantages that:
the converter transformer hot melting support plate is mainly used in a converter transformer noise reduction device and used for supporting a noise reduction plate above the converter transformer noise reduction device, when a fire disaster occurs in the converter transformer, the converter transformer hot melting support plate can be automatically fused and fall off, so that the noise reduction plate falls off, the converter transformer is exposed, an external fire-fighting medium can directly act on a fire source conveniently, damage to equipment and auxiliary facilities which explode at the initial stage of the converter transformer is reduced, and the flame retardant can prevent the converter transformer hot melting support plate from supporting combustion so as to avoid fire potential expansion. The invention utilizes the flame retardant property of silicon dioxide to prepare the high-efficiency flame-retardant hot-melt support plate under the condition of low addition amount of the silicon dioxide. According to the invention, the novel hot-melt support plate with high anti-aging tensile strength and anti-aging bending strength is prepared by adjusting the proportion of the nylon, the water repellent, the anti-aging agent, the antistatic agent and the low-temperature-resistant thickening agent. The novel hot melt plate is soaked in the acrylic acid solution in the cooling process in the manufacturing process, a compact waterproof film is easily formed on the surface of the novel hot melt plate, the tolerance of the novel hot melt support material to rainwater is effectively improved, and the aging time of the novel hot melt support material is prolonged. The water repellent introduced by the invention can enhance the water blocking effect of the converter transformer hot-melting support plate, and the antistatic agent can achieve the purpose of reducing static accumulation because the converter transformer hot-melting support plate is applied to a high-voltage live operating environment, thereby preventing the damage to operation and maintenance personnel caused by the static accumulation and avoiding the fire phenomenon possibly caused by the static accumulation. The anti-aging agent and the low-temperature-resistant thickening agent can ensure that the converter transformer hot-melting support plate still has better anti-aging performance in a low-temperature area.
Drawings
FIG. 1 is a graph showing the thermal aging tensile strength of a converter transformer hot melt support plate as a function of time in accordance with one embodiment of the present invention;
FIG. 2 is a graph showing the thermal aging bending strength of a converter transformer hot melt support plate as a function of time in accordance with one embodiment of the present invention;
FIG. 3 is a graph showing the thermally aged tensile strength of a commutation hot melt support plate as a function of time in a third embodiment of the present invention;
FIG. 4 is a graph showing the thermal aging bending strength of the commutation hot melt support plate according to the third embodiment of the present invention;
fig. 5 is a test result chart of three kinds of converter transformer hot-melt support plates in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a converter hot-melt support plate comprises the following components in parts by weight: 15 parts of nylon, 8 parts of flame retardant, 2 parts of water repellent, 8 parts of anti-aging agent, 1 part of antistatic agent and 1 part of low-temperature resistant thickener.
The nylon is nylon 66, the flame retardant is silicon dioxide with a particle size of less than 5 micrometers, the water repellent is polysiloxane with a particle size of less than 10 micrometers, the anti-aging agent is one of aluminum oxide, calcium oxide, boron oxide and magnesium oxide, in this embodiment, the anti-aging agent is calcium oxide with a particle size of less than 3 micrometers, the antistatic agent is one or a combination of more of alkyl sulfonic acid, phosphoric acid and dithiocarbamic acid, in this embodiment, the antistatic agent is alkyl sulfonic acid, the low-temperature resistant thickener is one or a combination of more of methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose, and in this embodiment, the low-temperature resistant thickener is methyl cellulose.
The invention also discloses a preparation method for preparing the converter transformer hot melting support plate, which comprises the following steps:
s1, weighing: weighing 15 parts of nylon, 8 parts of flame retardant, 2 parts of water repellent, 8 parts of anti-aging agent, 1 part of antistatic agent and 1 part of low-temperature resistant thickener according to parts by mass;
s2, mixing: sequentially adding the flame retardant, the water repellent, the anti-aging agent and the antistatic agent into a stirrer and uniformly mixing; simultaneously heating the nylon to 250 ℃ by a heating device and keeping the temperature for 3 minutes to completely melt the nylon; then adding the molten nylon and the low-temperature-resistant thickening agent into a stirrer in sequence, and stirring for 30 minutes at 250 ℃ at the speed of 500 revolutions per minute;
s3, filling: pouring the stirred liquid mixture into a prefabricated mold cavity until the mold cavity is completely filled;
s4, pressurization: the method comprises the following steps of controlling a top cover of a mold cavity to descend to be pressed on the top of the mold cavity through a screw of an injection molding machine, then controlling the top cover to move laterally, continuously applying pressure to a liquid mixture, compacting the liquid mixture, and increasing the density of the liquid mixture, namely densifying, so as to compensate the shrinkage behavior of a liquid nylon material; the injection molding machine is prior art in this embodiment.
s5, cooling: cooling the outside of the mold cavity; and cooling the outside of the mold cavity by using a special cooling water pipe. The closer the cooling water pipe is to the die cavity, the larger the pipe diameter is, the more the number is, the better the cooling effect is, and the shorter the cooling time is.
s6, soaking: and when the liquid mixture is cooled to a solid mixture at the temperature of 80 ℃, completely immersing the solid mixture into a normal-temperature acrylic acid solution with the concentration of 3%, increasing the surface hydrophobicity, and taking out the solid mixture when the immersion time is 12 hours, namely the conversion heating hot melt support plate.
Further, in step s4, the mold cavity has an opening facing upward, the top cover includes a horizontal frame plate and a lifting plate slidably mounted in the frame plate, and a projection of the lifting plate in the vertical direction is located in the mold cavity opening.
Further, when lifter plate and deckle board bottom parallel and level, top cap lateral shifting, concrete moving means is: the injection molding machine drives the top cover to descend to press the opening of the mold cavity, the stirred liquid mixture can be continuously injected into the mold cavity through the injection molding machine, for example, the liquid mixture is injected through an injection opening formed in the lifting plate, the lifting plate is lifted and then pressed down, the interior of the mold cavity can be further compacted, and when the lifting plate is flush with the bottom of the frame plate, the top cover moves laterally, for example, moves forwards, and the surface polishing of the preformed plate can be realized.
FIG. 1 is a graph showing the heat aged tensile strength of the commutation thermomelting support plate (formulation 1) obtained in this example as a function of time. Fig. 2 is a graph showing the heat aging bending strength of the commutation thermomelting support plate (formulation 1) obtained in this example as a function of time.
Example two:
the difference between this embodiment and the first embodiment is:
the components in this example have the following mass numbers: 18 parts of nylon, 5 parts of flame retardant, 3 parts of water repellent, 5 parts of anti-aging agent, 2 parts of antistatic agent and 2 parts of low-temperature resistant thickener.
The antistatic agent is dithiocarbamic acid.
In step s1, weighing: weighing 18 parts of nylon, 5 parts of flame retardant, 3 parts of water repellent, 5 parts of anti-aging agent, 2 parts of antistatic agent and 2 parts of low-temperature resistant thickener according to the parts by mass;
in step s2, mixing: sequentially adding the flame retardant, the water repellent, the anti-aging agent and the antistatic agent into a stirrer and uniformly mixing; simultaneously heating the nylon to 275 ℃ by a heating device and keeping for 4 minutes to completely melt the nylon; then adding the molten nylon and the low-temperature-resistant thickening agent into a stirrer in sequence, and stirring for 45 minutes at 275 ℃ at the speed of 1000 revolutions per minute;
in step s6, soaking: and when the liquid mixture is cooled to a solid mixture at 90 ℃, completely immersing the solid mixture into a normal-temperature acrylic acid solution with the concentration of 10%, and taking out the solid mixture to obtain the conversion heating hot melting support plate when the immersion time is 14 hours.
Example three:
the difference between this embodiment and the first embodiment is:
the converter transformer hot melting support plate in the embodiment comprises the following components in parts by weight: 20 parts of nylon, 3 parts of flame retardant, 2 parts of water repellent, 3 parts of anti-aging agent, 1 part of antistatic agent and 3 parts of low-temperature resistant thickener.
The anti-aging agent is aluminum oxide with the particle size of less than 3 microns, the antistatic agent is alkyl sulfonic acid, and the low-temperature resistant thickening agent is hydroxyethyl cellulose.
In step s1, weighing: weighing 20 parts of nylon, 3 parts of flame retardant, 2 parts of water repellent, 3 parts of anti-aging agent, 1 part of antistatic agent and 3 parts of low-temperature resistant thickener according to parts by mass.
In step s2, mixing: sequentially adding the flame retardant, the water repellent, the anti-aging agent and the antistatic agent into a stirrer and uniformly mixing; simultaneously heating the nylon to 300 ℃ by a heating device and keeping the temperature for 5 minutes to completely melt the nylon; then adding the melted nylon and the low-temperature resistant thickening agent into a stirrer in sequence, and stirring for 60 minutes at the temperature of 300 ℃ at the speed of 2000 rpm;
in step s6, soaking: and when the liquid mixture is cooled to a solid mixture at 100 ℃, completely immersing the solid mixture into a normal-temperature acrylic acid solution with the concentration of 15%, and taking out the solid mixture to obtain the conversion heating hot melting support plate when the immersion time is 16 hours.
Fig. 3 is a graph showing the thermally aged tensile strength of the commutation-fused support plate (formulation 3) obtained in example three as a function of time.
FIG. 4 is a graph showing the heat aged flexural strength of the commutation thermomelting support plate (formulation 3) obtained in example three as a function of time.
The results of the testing of the fusing of the commutation hot-melt support plate obtained in the three embodiments are shown in table 1 and fig. 5 below:
TABLE 1 results of the testing of the fusing of the converter hot-melt support plate
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A converter hot melt support plate, comprising: comprises the following components in parts by weight: 15-20 parts of nylon, 3-8 parts of flame retardant, 2-5 parts of water repellent, 2-8 parts of anti-aging agent, 1-2 parts of antistatic agent and 1-3 parts of low-temperature resistant thickener.
2. The commutation-hot melt support plate of claim 1, wherein: the nylon is nylon 66.
3. The commutation-hot melt support plate of claim 1, wherein: the flame retardant is silicon dioxide.
4. The commutation-hot melt support plate of claim 1, wherein: the water repellent is polysiloxane.
5. The commutation-hot melt support plate of claim 1, wherein: the anti-aging agent is one of aluminum oxide, calcium oxide, boron oxide and magnesium oxide.
6. The commutation-hot melt support plate of claim 1, wherein: the antistatic agent is one or more of alkyl sulfonic acid, phosphoric acid or dithiocarbamic acid.
7. The commutation-hot melt support plate of claim 1, wherein: the low-temperature resistant thickening agent is one or a combination of more of methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose.
8. A method for manufacturing a converter-thermoplast support plate according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:
s1, weighing: weighing 15-20 parts of nylon, 3-8 parts of flame retardant, 2-5 parts of water repellent, 2-8 parts of anti-aging agent, 1-2 parts of antistatic agent and 1-3 parts of low-temperature resistant thickener according to parts by mass;
s2, mixing: sequentially adding the flame retardant, the water repellent, the anti-aging agent and the antistatic agent into a stirrer and uniformly mixing; simultaneously heating the nylon to 250-300 ℃ by a heating device and keeping the temperature for 3-5 minutes to completely melt the nylon; then, the molten nylon and the low-temperature-resistant thickening agent are sequentially added into a stirrer and stirred for 30-60 minutes at the temperature of 250-300 ℃ at the speed of 500-2000 rpm;
s3, filling: pouring the stirred liquid mixture into a prefabricated mold cavity until the mold cavity is completely filled;
s4, pressurization: controlling a top cover of the mold cavity to descend and press the top of the mold cavity through an injection molding machine, then controlling the top cover to move laterally, continuously applying pressure to the liquid mixture, and compacting the liquid mixture;
s5, cooling: cooling the outside of the mold cavity;
s6, soaking: and when the liquid mixture is cooled to a solid mixture at the temperature of 80-100 ℃, completely immersing the solid mixture into a normal-temperature acrylic acid solution with the concentration of 3-15%, and taking out the solid mixture to obtain the conversion heating fusible support plate when the immersion time is more than 12 hours.
9. The method for preparing a converter transformer hot melt support plate according to claim 8, wherein: in step s4, the mold cavity has an upward opening, the top cover includes a horizontal frame plate and a lifting plate slidably mounted in the frame plate, and a projection of the lifting plate in the vertical direction is located in the mold cavity opening.
10. The method for preparing a converter transformer hot melt support plate according to claim 9, wherein: when the lifting plate is flush with the bottom of the frame plate, the top cover moves laterally.
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| CN111763424B (en) | 2022-09-30 |
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