Resin Vacuum Casting Equipment | For Dry-Type Transformers & HV Insulation

Resin Vacuum Casting Equipment is a core technology in the production of high-voltage electrical components such as dry-type transformers and instrument transformers. Its primary function is to mix and degas materials like epoxy resin and hardener under a vacuum, then cast the mixture into molds. This process eliminates voids and ensures the insulating properties meet the stringent standards required for high-voltage operation.

Core Components and Process:

• Material Preparation & Mixing:The system features separate tanks for resin and hardener, where materials are heated and dehydrated under vacuum. After precise metering, the components are thoroughly mixed in a dedicated mixing tank.

• Vacuum Casting:Molds are placed inside a vacuum casting chamber. Once a vacuum is drawn, the blended material is injected into the molds. With air absent both in the material and the mold, the resin precisely fills complex internal cavities.

• Curing:After casting, the assembly is subjected to controlled heating to cure the resin into its final solid form.

Core Advantages:

• Superior Quality:By eliminating voids, the equipment produces a dense insulation layer, significantly enhancing the product's Partial Discharge Inception Voltage (PDIV) and dielectric strength.

• High Precision:Electronic weighing systems ensure an exact mixing ratio of the A and B components for consistent material properties.

• Automation:PLC-based controls guarantee a stable, efficient, and repeatable production process.

Application Range:This technology is widely used for casting dry-type transformer coils, high-voltage instrument transformers, reactors, and various insulating components.