Glass Insulator Manufacturing Process

This process focuses only on the glass disc production and does not include the assembly of metal fittings (such as steel caps and pins). 1. Raw Material Preparation • The main components include quartz sand, soda ash, limestone, feldspar, etc. • These materials are precisely proportioned to ensure the glass has excellent electrical insulation and mechanical strength. 2. Melting • The raw materials are heated in a high-temperature furnace (about 1500°C) until they completely melt into a uniform glass liquid. • The molten glass undergoes degassing and homogenization to remove bubbles and ensure uniformity. 3. Molding • The molten glass flows into a mold and is shaped using either press molding or centrifugal casting techniques. 4. Annealing • The glass discs are slowly cooled in an annealing furnace to eliminate internal stress and improve strength and stability. 5. Toughening (Tempering) • The annealed glass discs undergo rapid cooling, forming high-strength toughened glass. • This toughening process ensures that if the glass breaks, it shatters into small granular pieces instead of sharp shards, improving safety. 6. Quality Inspection • The finished glass discs are tested using optical inspection, dimensional measurement, mechanical strength testing, and dielectric strength testing to ensure they meet industry standards. 7. Storage and Transportation • Approved glass discs are stored in a clean area, ready for assembly into complete glass insulators.