The role of glass hot bending graphite mold
Feb 23, 2024
Glass hot bending graphite mold is an important tool in the glass hot bending process, its main functions are as follows:
Provide shape: The shape of the glass hot bending graphite mold determines the shape of the glass after hot bending. According to the need, the mold can be a variety of shapes, such as arc, surface, concave, convex and so on.
Transfer heat: The glass hot bending process requires the glass to be heated to a softened state and then bent. Glass hot bending graphite mold has good thermal conductivity, can quickly transfer heat to the glass, so that it is evenly heated.
Prevent glass cracking: During the hot bending process of glass, the glass will be subjected to a certain stress. The glass hot bending graphite mold has certain strength and elasticity, which can prevent the glass from breaking during the hot bending process.
The material of glass hot bending graphite mold is generally graphite, because graphite has the following advantages:
High temperature resistance: the melting point of graphite is 3850℃, which can withstand high temperatures in the glass hot bending process.
Good thermal conductivity: the thermal conductivity of graphite is 100-200 W/m·K, which can quickly transfer heat to the glass.
Good lubricity: The graphite surface has a certain lubricity, which can reduce the friction between the glass and the mold and prevent the glass from breaking during the hot bending process.
The manufacturing process of glass hot bending graphite mold is generally the following steps:
Preparation of graphite blank: according to the shape of the mold, the graphite powder is pressed into the blank.
Processing graphite blank: Using the method of mechanical processing, the graphite blank is processed into the shape of the mold.
Heat treatment: Heat treatment of the mold after processing to improve its performance.
The service life of the glass hot bending graphite mold is generally 2-3 years, and the specific life depends on the use environment and conditions.
