Annealing is a critical process determining product lifespan in glass bottle manufacturing, and the core competitiveness that makes us a preferred glass bottle wholesale supplier. Unlike ordinary cooling processes, precision annealing completely eliminates internal glass stress through accurate temperature and time control, creating high-quality containers with both strength and safety. Below is a detailed breakdown of the five scientific steps of our annealing line:
- Automated Bottle Loading & Fixturing: A high-speed loading system automatically clamps freshly blown glass bottles (including vodka bottles, mason glass jars, etc.) onto rotating fixtures. This stable fixing method ensures each bottle receives uniform heat exposure, which is crucial for maintaining the slender shape of champagne bottles and the pressure-resistant structure of beer bottles.
- Gradual Thermal Conditioning: After entering the 60-meter annealing tunnel, glass bottles undergo computer-controlled gradient temperature changes. Starting at 550°C, the temperature gradually decreases in 25°C increments over 45 minutes. This slow cooling process effectively releases internal stress, preventing liquor bottles and juice bottles from cracking during transportation while preserving the transparency of wine bottles and the intricate details of custom bottles.
- Real-Time Temperature Monitoring: Thermal sensors inside the tunnel track the temperature change of each bottle in real time. Once a deviation is detected, the system automatically adjusts the heat output of the corresponding zone to ensure consistent quality for bulk glass bottles and wholesale wine bottles. This precision control is a key reason for winning customer trust.
- Post-Annealing Quality Inspection: After exiting the tunnel, technicians inspect thermal stress using polarized light and check for surface defects. From mini liquor bottles to tall wine bottles, only products that fully meet strict standards move on to the next process, ensuring every batch you receive is flawless.
- Cold-End Finishing & Bulk Packaging: In the final stage, we apply brand logos to custom bottles via silk-screen printing, embossing, or laser engraving. Subsequently, glass bottles, mini liquor bottles, and other products are packed into eco-friendly shock-resistant crates, with optimized designs for global shipping needs, fully supporting our wine bottle wholesale and glass bottle wholesale businesses.