How To Perform On-site Casting Of Epoxy Resin Sleeves? Detailed Breakdown Of Sealant Treatment.

Site Preparation and Pouring Environment Setup

Upon arrival at the site, controlling ambient humidity and dust is the first step. epoxy bushing is extremely sensitive to moisture during installation, directly affecting subsequent insulation performance. Clean the inner wall of the sleeve and the mating surfaces of the metal parts, removing the oxide layer. If the air humidity exceeds the specified value, a temporary heating shed is usually required.

Sealant Sealing Process

Filling with sealant is not a simple application; it involves interface compatibility. Operators need to evenly push the sealant into the pre-reserved groove, eliminating any residual air bubbles.

1. Sealant Proportioning and Mixing

When mixing sealant on-site, the stirring speed must be constant. If the stirring speed fluctuates, a large number of tiny air bubbles will be trapped inside the sealant. Observe the color change of the sealant until the slight color difference is no longer visible to the naked eye.

2. Interface Wetting Treatment

Due to the material characteristics of epoxy resin bushing, the sealing surface needs to be pre-treated before applying the sealant. After wiping with a special cleaning agent, quickly apply the first layer of sealant to the wall.

Core Steps of On-Site Casting of Epoxy Resin Sleeves

The fluidity of the castable determines the tightness of the filling.

• Constant Temperature Heating: Preheat the raw material container to increase fluidity.

• Slow Injection: Slowly pour the refractory along the edge of the mold, allowing the liquid level to rise at a uniform rate.

• Pressure Maintenance: Maintain a slight positive pressure at the pouring nozzle to expel trace amounts of gas from the gaps.

Curing Cycle Monitoring

After grouting, the site cannot be evacuated immediately. The internal reaction of epoxy resin cast bushing is exothermic, and the temperature rise curve must be controlled within the design range.

Technical Details Breakdown:

In the initial curing stage, measure the surface temperature every 15 minutes. If the ambient temperature difference is too large, the adhesive layer is prone to micro-cracks. Observe the shrinkage rate at the overflow port and, based on experience, add a small amount of excess material. This "small, frequent" replenishment method can solve the common shrinkage cavity problem later.

Quality Inspection and Post-Finishing

After complete hardening, remove excess residue from the edges. Check for delamination or gaps at the sealant joint. Although this on-site handling method is time-consuming, it can solve the problem of minor damage to factory-prefabricated components after long-distance transportation.