How the hot melt glass is colored and processed in the source factory of Guangzhou craft glass.
Release time:
Dec 19,2024
Hot melt glass, also known as crystal three-dimensional art glass or casting glass, belongs to the glass thermal processing technology. The coloring production process usually involves the following steps:
1. Main raw materials and equipment
Main raw materials: flat glass, inorganic pigments, etc.
Main equipment: special hot melting furnace, forming molds, annealing equipment, etc.
2. Coloring production process
Raw material preparation:
Select glass produced by the same manufacturer to ensure consistency in melting point temperature.
Prepare corresponding inorganic pigments as colorants according to design requirements.
Glass heating:
Place the glass in a special hot melting furnace and set a specific heating program based on the melting point temperature of the glass.
Heat to above the glass softening point to make the glass plastic.
Forming and coloring:
During the heating process, pour the melted glass into special forming molds, the shape of the mold determines the final shape of the glass product.
At the same time, inorganic pigments fuse with the glass at high temperatures to color the glass.
Annealing treatment:
After forming, the glass products undergo annealing treatment to eliminate internal stress and prevent the glass from cracking during cooling.
The annealing process requires strict control of the temperature curve to ensure the glass cools slowly.
Post-processing:
After annealing is complete, the glass products can undergo post-processing such as engraving, drilling, and trimming to meet specific needs.
3. Precautions
Temperature control: In the production and processing of hot melt glass, temperature control is crucial. Heating temperatures that are too high or too low will affect the forming effect and coloring quality of the glass.
Mold selection: The material and shape of the forming mold have a significant impact on the quality of the final product. It is necessary to choose materials that are heat-resistant and have no thermal expansion changes to make the molds, and customize the mold shape according to design requirements.
Colorant selection: The choice and ratio of inorganic pigments will affect the color effect of the final product. It is necessary to select suitable colorants based on design requirements and carry out precise ratios.
Annealing treatment: Annealing treatment is a key step in eliminating internal stress in glass. It is necessary to strictly control the annealing temperature and time to ensure the stability and safety of the glass products.
4. Coloring methods
The coloring methods for hot melt glass are not limited to adding inorganic pigments during the melting process, but can also be achieved through other means, such as:
Spraying: Spray a mixture of metal films or resin salts on the surface of the glass, and then treat it at high temperatures to fuse the film or mixture with the glass, forming specific colors and luster.
Diffusion coloring: Coat metal salts on the surface of the glass, and after a certain period of heat treatment, the metal ions in the salts will diffuse into the surface layer of the glass, coloring the glass.
In summary, the coloring production process of hot melt glass is a complex and delicate process that requires strict control of the conditions and parameters at each stage to ensure the quality and effect of the final product.
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China Guangdong Haibo Special Glass Technology Co., Ltd. Unified Social Credit Code: 91440101MA5AT33G12 Contact Numbers: General Manager Cao, 13178822749; General Manager Wei, 13533794186.