Tempered glass is widely recognized for its strength and safety features, making it a popular choice in various applications, from architectural design to automotive manufacturing. However, one common issue that manufacturers face is the appearance of white haze on tempered glass. This phenomenon can arise from several factors, and understanding these causes is essential for effective prevention. LandGlass, a leader in glass tempering technology, offers valuable insights on how to minimize the chances of white haze during the tempering process.
1. Proper Parameter Setting
One of the primary contributors to white haze is improper parameter settings in the glass tempering furnace. Specifically, if the bottom heating temperature is set too high, it can lead to undesirable effects on the glass surface. To prevent this, it is crucial to adjust the temperature parameters of the bottom heating zone to align with the specific heating requirements of the glass being processed.
Moreover, an insufficient thermal balance within the heating furnace can exacerbate the problem. To ensure optimal thermal conditions, consider increasing the pressure or extending the opening time of the thermal balance. These adjustments can significantly reduce the likelihood of white haze formation, ensuring a clearer, more aesthetically pleasing product.
2. Addressing Mechanical Causes
Mechanical issues during the tempering process can also contribute to the emergence of white haze. Unsynchronized ceramic rollers or excessive radial run-out during rotation can disrupt the glass’s heating and cooling cycles, leading to surface imperfections. Regular inspections of the furnace’s drive system are essential to identify and rectify any mechanical discrepancies.
To further mitigate this issue, it is vital to assess the radial run-out condition of the ceramic rollers. Ensuring that these rollers are horizontally aligned using a level instrument can help maintain consistent contact with the glass, preventing the occurrence of haze.
3. Ensuring Proper Glass Preprocessing
A significant portion of white haze issues originates from inadequate glass preprocessing, particularly due to the presence of glass dust from edge grinding. This dust can adhere to the glass surface during the tempering process, resulting in a cloudy appearance. To combat this, it is essential to thoroughly wash off any glass dust before tempering.
Additionally, the quality of washing water plays a pivotal role in preventing white haze. If the washing water is not adequately cleaned, it can leave residues that contribute to haze formation. To ensure optimal results, glass manufacturers should prioritize frequent cleaning of the water tanks in the glass washer. This simple yet effective measure can significantly enhance the clarity of the tempered glass.
The appearance of white haze on tempered glass can be a frustrating challenge for manufacturers, but with the right strategies in place, it is possible to minimize its occurrence. By focusing on proper parameter settings, addressing mechanical issues, and ensuring thorough glass preprocessing, manufacturers can enhance the quality of their tempered glass products. LandGlass remains committed to providing innovative solutions and expert guidance to help the industry achieve the highest standards of glass clarity and performance.
Source:LandGlass with additional information added by GlassBalkan
