Vacuum casting method for epoxy resin

A technology of vacuum casting and epoxy resin, applied in the direction of coil manufacturing, etc., can solve the problems of not being suitable for the production needs of enterprises and high cost, and achieve the effect of eliminating internal and surface defects, reducing production costs, and reducing internal and surface defects

Inactive Publication Date: 2010-09-29
上海凯利电器厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The epoxy resin vacuum casting process used in the past is a reference process provided by the manufacturer, which is not suitable for the production needs of the enterprise, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] raw material:

[0012] raw material

Manufacturer

model

main ingredient

epoxy resin

Huntsman Advanced Chemical Materials Co., Ltd.

FCI

Bisphenol A epoxy resin

Epoxy curing agent

Huntsman Advanced Chemical Materials Co., Ltd.

HY905CI

Hexahydrophthalic anhydride

Toughener

Huntsman Advanced Chemical Materials Co., Ltd.

DY040CI

polypropylene alcohol

Accelerator

Huntsman Advanced Chemical Materials Co., Ltd.

DY062

Benzyldimethylamine

Silica powder

Huzhou Jiuli Huafei Silica Powder Co., Ltd.

HGH12

silica

color paste

Huntsman Advanced Chemical Materials Co., Ltd.

DW0133

Bisphenol A epoxy resin

[0013] crafting process:

[0014] (1), preparation process:

[0015] Check whether there is any air leakage in the vacuum pouring system, whether the various instruments are working normally, and whether the pipeline is unblocked. If any problems ...

Embodiment 2

[0030] Raw material is identical with embodiment 1, and technological process is as follows:

[0031] (1), preparation process:

[0032] Check whether there is any air leakage in the vacuum pouring system, whether the various instruments are working normally, and whether the pipeline is unblocked. If any problems are found, report to the relevant personnel for maintenance in time.

[0033] Microsilica powder must be dried before use, and the drying temperature and time are: 105°C / 8 hours.

[0034] Preheat the vacuum pouring tank to 75°C and the mixing tank to 45°C.

[0035] If the ambient temperature is low and the material has high viscosity and poor fluidity, it can be liquefied at 40°C before use.

[0036] Push the working vehicle carrying the pouring coil into the vacuum pouring pot, take a transparent heat-resistant plastic pipe (110°C) of appropriate length, connect it to the pouring valve and lock it with a pipe clamp. The plastic pipe extends into the pouring body a...

Embodiment 3

[0046] Raw material is identical with embodiment 1, and technological process is as follows:

[0047] (1), preparation process:

[0048] Check whether there is any air leakage in the vacuum pouring system, whether the various instruments are working normally, and whether the pipeline is unblocked. If any problems are found, report to the relevant personnel for maintenance in time.

[0049] Microsilica powder must be dried before use, and the drying temperature and time are: 95°C / 8 hours.

[0050] Preheat the vacuum pouring tank to 65°C and the mixing tank to 35°C.

[0051] If the ambient temperature is low and the material has high viscosity and poor fluidity, it can be liquefied at 30°C before use.

[0052] Push the working vehicle carrying the pouring coil into the vacuum pouring pot, take a transparent heat-resistant plastic pipe (120°C) of appropriate length, connect it to the pouring valve and lock it with a pipe clamp. The plastic pipe extends into the pouring body ab...

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PUM

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Abstract

The invention relates to vacuum casting method for epoxy resin. The vacuum casting method is characterized by comprising the following concrete steps of: drying silicon micro powder for 8 hours at the temperature of 100+ / -5 DEG C; preheating a vacuum casting tank to 70+ / -5 DEG C; preheating a mixing tank to 40+ / -5 DEG C; adding epoxy resin, epoxy curing agent, silicon micro powder, color paste, a toughening agent and an accelerant into the mixing tank; heating the vacuum casting tank to 70 DEG C and vacuumizing after one hour; casting epoxy resin mixture in the mixing tank into a transformer coil mould and keeping 3-5 hours when the vacuum degree reaches 5mbar. The invention has the advantages of effectively improving the strength of electrical insulation materials, reducing and eliminating the internal and surface defects and reducing the production costs.

Description

technical field [0001] The invention relates to an epoxy resin vacuum pouring method, which is used for encapsulating an insulating dry-type transformer, and belongs to the technical field of transformer manufacturing methods. Background technique [0002] The epoxy resin vacuum pouring process used before is a reference process provided by the manufacturer, which is not suitable for the production needs of the enterprise, and the cost is high. Contents of the invention [0003] The purpose of the present invention is to overcome above-mentioned shortcoming, a kind of epoxy resin vacuum pouring method is provided. [0004] In order to achieve the above object, the technical solution of the present invention is to provide a vacuum pouring method for epoxy resin, characterized in that, the specific steps are: [0005] The first step is to dry the microsilica powder at 100±5°C for 8 hours, preheat the vacuum pouring tank to 70±5°C, and preheat the mixing tank to 40±5°C; put ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/12B29C39/42
Inventor 朱晓宝
Owner 上海凯利电器厂有限公司
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