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A method for descaling pressure gel molds

A pressure gel and mold technology, which is applied in the field of transformers and insulating parts, can solve the problems of high cost, low efficiency of mold descaling, and impact on mold life, and achieves short cleaning time, shortened cleaning time, and cost savings. Effect

Active Publication Date: 2019-12-13
GUANGDONG SIHUI INSTR TRANSFORMER WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the present invention proposes a method for descaling of pressure gel molds, which mainly solves the problems of low mold descaling efficiency, high cost and affecting mold life

Method used

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  • A method for descaling pressure gel molds

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 , prepare the descaling agent, mix N-methylpyrrolidone and triethylene glycol at a ratio of 5:1 and pour it into the watering can, use the watering can to spray the descaling agent on the surface of the mold to be cleaned by compressed air, the descaling agent should be Completely cover the material attached to the surface of the mold, close the feed port, heat the mold to the preset temperature of 130°C, and keep the preset temperature for 0.5 hours. At this time, the temperature of the heat preservation is the same as the preset temperature, which is convenient for operation. Let it stand until the temperature drops To 100 ℃ and above, open the mold, use a high-pressure air gun to clean most of the cured epoxy resin, and then wipe the surface of the mold with a cloth with strong hygroscopicity. mold agent.

Embodiment 2

[0027] Such as figure 1 , prepare the descaling agent, mix N-methylpyrrolidone and triethylene glycol at a ratio of 5:1 and pour it into the watering can, use the watering can to spray the descaling agent on the surface of the mold to be cleaned by compressed air, the descaling agent should be Completely cover the material attached to the surface of the mold, close the feed port, heat the mold to the preset temperature of 140°C, and keep the preset temperature for 0.5 hours. At this time, the temperature of the heat preservation is the same as the preset temperature, which is convenient for operation. Let it stand until the temperature drops to 100°C and above,

[0028] Open the mold, use a high-pressure air gun to clean most of the cured epoxy resin, and then wipe the surface of the mold with a cloth with strong hygroscopicity. The removal rate of dirt is 85%, and then re-apply the release agent.

Embodiment 3

[0030] Such as figure 1 , prepare the descaling agent, mix N-methylpyrrolidone and triethylene glycol at a ratio of 5:1 and pour it into the watering can, use the watering can to spray the descaling agent on the surface of the mold to be cleaned by compressed air, the descaling agent should be Completely cover the material attached to the surface of the mold, close the feed port, heat the mold to the preset temperature of 150°C, and keep the preset temperature for 0.5 hours. At this time, the temperature of the heat preservation is the same as the preset temperature, which is convenient for operation. Let it stand until the temperature drops To 100 ℃ and above, open the mold, use a high-pressure air gun to clean most of the cured epoxy resin, and then wipe the surface of the mold with a cloth with strong hygroscopicity. The removal rate of dirt can reach 90%. mold agent.

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Abstract

The invention discloses a method for removing scale from a pressure gel mold. The method comprises a scale remover, wherein the scale remover comprises an organic solvent; and the organic solvent comprises N-methylpyrrolidinone and triethylene glycol. The method comprises the following steps of sprinkling the scale remover on the surface of the mold to be cleaned; heating the mold to a pre-set temperature; maintaining the pre-set temperature for some time; and removing materials adhered to the surface of the mold in a set temperature range. The method disclosed by the invention can be operatedon a mold locking machine, and discharging is not needed, so that the method is simple and quick, and time for cleaning is short; and in the treating process, the mold is not damaged, so that the life of the mold is not influenced, renewedly performing surface oxidation or electroplating treatment is not needed, and the cost is saved.

Description

technical field [0001] The invention relates to a processing method of a pressure gel mold, which is used for transformers and insulating fittings with a voltage level of 6-35kV epoxy resin insulation, and belongs to the technical field of transformers and insulating parts. Background technique [0002] At present, in the process of using the pressure gel process to produce transformers and insulating accessories, a layer of solidified material will gradually accumulate on the surface of the inner cavity of the mold, which will affect the appearance quality of the molded product. However, the cured matter is difficult to clean, and the cleaning steps are cumbersome. The mold needs to be disassembled from the clamping machine, and the dirt should be removed by grinding and polishing. use. The existing method of cleaning the cured product takes a long time, seriously damages the performance of the mold, and the cost of cleaning is high. Contents of the invention [0003] I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C33/72
Inventor 徐梁山张丽珍
Owner GUANGDONG SIHUI INSTR TRANSFORMER WORKS
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