Manufacturing device and method for dual-component mixed epoxy casting dielectric functional gradient insulator

Abstract

The invention discloses a manufacturing device and method for a dual-component mixed epoxy casting dielectric functional gradient insulator. The manufacturing device comprises a dual-material feedingsystem, wherein an extrusion head of the feeding system is arranged on a three-dimensional motion system; the diameter of a spray hole of the extrusion head is adjustable, and one end of the extrusionhead is positioned inside an epoxy casting metal mould; the three-dimensional motion system is connected to a control system; the control system and the feeding system are separately connected to a computer through cables for raw material supply, mixing and extruding as well as control, on X-direction, Y-direction and Z-direction positions, of the extrusion head, so that manufacturing of a dielectric-constant functional gradient insulator is accomplished. Two epoxy resin composite materials of different dielectric properties are mixed on line, so that materials are accurately transferred to specific positions in the mould through a three-dimensional motion platform, and a large-dimension insulator with continuous dielectric characteristic gradient distribution can be manufactured withoutchanging other characteristics of an insulating structure, and therefore, along-surface electrical resistance is improved.

Description

Technical field [0001] The invention belongs to the technical field of high-voltage equipment manufacturing, and specifically relates to a two-component mixed epoxy pouring dielectric functionally graded insulation manufacturing device and method. Background technique [0002] Epoxy cast insulators have been widely used in power equipment such as switch cabinets, metal-enclosed SF6 insulated composite electrical appliances and power transmission lines (GIS and GIL) due to their excellent comprehensive performance. Since the electrical strength along the surface of the insulator is relatively low compared to the body characteristics, it directly determines the overall performance of the power equipment. In addition, with the development of equipment miniaturization, how to reduce the scale of the insulation structure is also a key issue to be solved urgently. Because the traditional epoxy cast insulation structure is a homogeneous material, the electric field distribution is unev...

AI Technical Summary

Problems solved by technology

The lamination method is easy to cause interface defects and can only form a single-dimensional gradient

Although the centrifugation method can realize two-dimensional gradient distribution, the controllability is poor, and the size of the sample cannot meet the needs of actual industrial applications.

There is an existing method of using light-cured 3D printing to realize the manufacture of insulating structures. This method is highly controllable and can achieve arbitrary gradient distribution, but its application to functional equipment such as electrical equipment insulators is still rare; and For the current 3D printing technology, the finished products often have many internal bubbles and defects, which are difficult to be used in the manufacture of high-voltage equipment insulators

There are still disadvantages such as limited molding scale and limited range of materials

[0004] It can be said that the lack of precise and controllable molding process and the preparation method of large-scale mass production have become the bottleneck restricting the development of dielectric functionally graded insulation.

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