Molybdenum piercing plug is a specialized high-temperature tool used in glass manufacturing industries. It is designed to withstand high temperatures (up to 1,900°C) and thermal shock without deforming. Molybdenum piercing plugs are used to pierce and form holes in glass during the manufacturing process. They are highly durable and have a long service life due to their excellent resistance to corrosion, oxidation, and wear.
The operating principle of a molybdenum piercing plug is based on its unique thermal and mechanical properties. Molybdenum is a refractory metal that has a high melting point and excellent thermal conductivity, making it ideal for use in high-temperature applications.
During glass manufacturing, the molybdenum piercing plug is brought into contact with the molten glass. The high thermal conductivity of molybdenum enables the plug to transfer heat quickly from the molten glass, preventing the formation of a cold layer at the tip of the plug.
The piercing plug is then used to pierce and form a hole in the glass. The mechanical strength and toughness of molybdenum allow the piercing plug to withstand the high stress and pressure generated during this process. The excellent wear resistance of molybdenum ensures that the piercing plug maintains its shape and size, providing consistent performance over extended periods.
Overall, the operating principle of a molybdenum piercing plug is based on its ability to withstand high-temperature and mechanical stresses, making it a reliable tool for glass manufacturing.
The specifications of a molybdenum piercing plug may vary depending on the specific application and requirements of the glass manufacturing process. Generally, molybdenum piercing plugs are made from pure molybdenum or molybdenum alloys and have the following specifications:
Material - Pure molybdenum or molybdenum-rhenium alloy
Purity - 99.95% or higher
Diameter - Typically range from 2 mm to 15 mm
Length - Ranging from 150 mm to 600 mm or more
Tensile Strength - 800 MPa or higher
Melting Point - 2,620°C or higher
Thermal Conductivity - 143 W/mK at room temperature
Coefficient of Thermal Expansion - 5.1x10^-6/K at 20-1000°C
Other specifications may include surface finish, straightness tolerance, and dimensional accuracy.
It is important to note that the specifications of a molybdenum piercing plug will depend on the specific application and usage, and as such should be selected carefully to ensure optimal performance. Factors such as temperature, pressure, and the chemical composition of the glass may also need to be considered when selecting a piercing plug.
Molybdenum piercing plugs are mainly used in the glass manufacturing industry for processes such as drawing glass fibers, pressing glass, and manufacturing glass containers. The high melting point, strength, and durability of molybdenum make it an ideal material for piercing tools in glass manufacturing industries.
One of the primary applications of molybdenum piercing plugs is in the production of glass fibers used in the telecommunications and electronics industry. During the fiber drawing process, a molybdenum piercing plug is used to create a hole in the molten glass, enabling drawing of the glass into a long, thin fiber.
Molybdenum piercing plugs are also used in the manufacture of various glass containers, such as bottles and jars. The piercing plug is used to create a hole in the molten glass after it is injected into a mold, and then the glass is allowed to cool and solidify around the plug, creating a container with an opening.
The excellent thermal conductivity of molybdenum provides an advantage during glass manufacturing processes, allowing the tip of the piercing plug to heat up quickly and maintain a constant temperature, ensuring uniform hole formation.
In conclusion, molybdenum piercing plugs find a wide range of applications in the glass manufacturing industry due to their high-temperature resistance, strength, durability, and excellent thermal conductivity.