Glass Sealing Mesh Belt Furnace Electronic Components 800C 27kW Nitrogen 4 Zones

The SLG glass to metal sealing mesh belt furnace provides a controlled nitrogen atmosphere platform for the sealing of glass to metal joints in electronic components, sensors, diodes, rectifiers and hermetic packages. Operating at a working temperature of 800C, the furnace melts and fuses the sealing glass to the metal housing while the nitrogen atmosphere prevents oxidation of the leads and the glass, producing gas tight, electrically insulating seals. A 300mm wide mesh belt passes the parts through four precisely controlled zones, and temperature uniformity of plusmn 2C ensures that every seal is formed under identical conditions, which is essential for components that must remain hermetic over a long service life.

• Precise 800C Sealing Control: Four heating zones with independent PID controllers maintain temperature uniformity of plusmn 2C, producing consistently hermetic glass to metal seals with clean, defect free surfaces.
• Nitrogen Protective Atmosphere: A sealed furnace tunnel with a controlled nitrogen circuit protects leads, housings and glass preforms from oxidation, ensuring reliable wetting and bonding of the sealing glass.
• Clean Electronic Grade Process: Stainless steel furnace internals and filtered gas supply minimize particle contamination, meeting the cleanliness requirements expected in electronic component manufacturing.
• Fine Belt Speed Adjustment: The inverter driven belt runs from 30mm to 200mm per minute, allowing residence times to be tuned precisely to different glass types and component sizes.
• Accurate Cooling Profile: A controlled cooling section prevents thermal shock and cracking of the glass seals as the components leave the hot zone, preserving both hermeticity and mechanical strength.
• Traceable Process Control: The PLC touch screen system stores dedicated sealing recipes, monitors all control points and logs process data, supporting quality documentation and repeatable production.

This nitrogen sealing mesh belt furnace is primarily used for glass to metal sealing of electronic components including diodes, rectifiers, thermistors, varistors and hermetic sensor packages, as well as glass bead sealing of terminals and connectors. It also supports the sealing of glass preforms in reed switches, crystal components and vacuum tube parts where a clean, oxidation free atmosphere is mandatory. Electronics manufacturers select this furnace because it combines a precise thermal profile with a stable protective atmosphere, delivering hermetic, electrically reliable seals at continuous production rates. The four zone configuration can be tuned to accommodate a range of glass softening temperatures and package geometries.

Each furnace is fully assembled, wired and temperature tested prior to shipment, and the nitrogen circuit is checked for leaks and pressure stability. The delivery includes the furnace main unit, inspection certificates for the principal components, a complete technical document set and spare heating modules and thermocouples. Packed in wooden cases with moisture barriers and cushioning, the equipment is protected for international shipment and storage. Our engineers support on site installation, commissioning and sealing process development, and the machine carries a defined warranty backed by prompt spare parts service.

Please tell us the component type, the sealing glass and metal materials, the required throughput and the atmosphere specification, and we will confirm the zone arrangement, belt speed range and gas circuit design. We will then provide a technical proposal, layout drawing and commercial quotation. Minimum order quantity is one unit, payment terms are T/T, and typical delivery is 70 to 95 days. Contact us for a sealing solution tailored to your electronic component production.