High borosilicate glass lampshades are an ideal choice for high-end lighting equipment due to their low thermal expansion coefficient, excellent thermal stability, high mechanical strength, and good transparency.Its production process integrates materials science and precision manufacturing technology, mainly including the following key links.

　　1、 Raw material preparation and glass melting

The basic components of high borosilicate glass mainly include silicon dioxide, boron oxide, as well as sodium oxide, aluminum oxide, etc. The raw materials need to be crushed, pre dried, and treated with iron removal, and accurately weighed and mixed according to the formula to form a uniform mixture. Subsequently, the mixed materials are sent into a fully electric melting glass furnace for high-temperature melting. The melting temperature of high borosilicate glass is relatively high. At this temperature, the mixture undergoes five stages: silicate formation, glass liquid formation, clarification, homogenization, and cooling, ultimately forming a uniform, bubble free, and stone free glass liquid. This process requires solving technical problems such as boron volatilization and glass liquid stratification, which are often addressed using high-temperature clarifying agents and furnace bottom discharge devices.

　　2、 Forming process

After cooling the glass liquid to a suitable viscosity (about 102-103 Pa · s), it enters the molding stage. The high borosilicate glass lampshade mainly adopts the "blowing" molding method.

1. Manual blowing: suitable for complex or artistic shapes. The craftsman uses a hollow iron blow tube about 1.5 meters long to dip glass liquid (pick material), rolls it evenly on the rolling plate, and then puts it into the mold to blow air, making it adhere to the inner wall of the mold and form.

2. Mechanical blowing: During large-scale production, fully automatic blowing machines are used. Glass liquid is formed into droplets of a set weight and shape by a feeding machine, which are then cut into the initial mold and pressed or blown into the initial shape, and then transferred to the forming mold to be blown into the final product. Mechanical blowing has high efficiency and can produce around 2000 qualified products per hour, with good product consistency.

　　3、 Post processing and annealing

The formed lampshade needs to undergo a series of processing:

1. Cutting: Use professional lampshade cutting equipment to cut the blown bubble shell to make the port flat. Mechanized cutting not only ensures a neat cut, but also increases the yield rate to over 97%.

2. Edge grinding: Fine polish the cutting edge to ensure a smooth hand feel without cutting hands.

Annealing is a crucial step. Glass lampshades cannot be allowed to cool naturally, otherwise they may crack due to significant internal stress caused by the temperature difference between the inside and outside. They must be sent into an annealing furnace for long-term, controllable insulation and slow cooling at a specific temperature to uniformly eliminate internal stress, improve product stability and mechanical strength.

　　4、 Quality Inspection and Packaging

The finished lampshade needs to be inspected to ensure no defects, compliant dimensions, and uniform light transmission. Finally, packaging and storage are carried out.

　　V. Conclusion

The production of high borosilicate glass lampshades is a technology intensive process that integrates precise raw material formulation, high-temperature melting, (blowing) molding, strict annealing, and fine post-processing. Among them, the application of full electric melting technology ensures the high quality and environmental friendliness of glass liquid production, while automated mechanical blowing and cutting technology greatly improves production efficiency and product consistency. It is precisely these rigorous processes that have created its excellent characteristics of high temperature resistance and high strength, meeting the stringent requirements of the high-end lighting market for quality and performance.