Glass Molds

Improve the service life of the mold: During the use of the glass mold, it is necessary to repeatedly withstand the erosion and friction of the molten glass, which is easy to cause the surface of the mold to wear. Hard coatings such as tungsten carbide and titanium nitride can be sprayed on the surface of the mold through thermal spraying technology, which can significantly improve the hardness and wear resistance of the mold surface.
Maintain the dimensional accuracy of the mold: Glass products have high requirements for dimensional accuracy, and the wear and tear of the mold will lead to dimensional deviation. The thermal spray hard coating can effectively resist wear, maintain the stability of the mold size, ensure that the dimensional accuracy of the glass products produced is within tolerance, and improve the consistency and yield of the product.
Reduced adhesion of glass to the mold: After the molten glass is molded in the mold, it needs to be successfully demolded. Thermal spraying of coatings with low surface energy, such as molybdenum disulfide and PTFE, can reduce the adhesion between the glass and the mold.
Reduce the use of release agents: Good release properties can reduce or even eliminate the use of release agents, avoid the impact of release agent residues on the surface quality of glass products, and also reduce production costs and environmental pollution.
Resistant to the erosion of molten glass: Molten glass contains various chemicals that can corrode the mold material at high temperatures. Thermal spraying ceramic coatings, nickel-based alloy coatings, etc., can form a dense corrosion-resistant protective film on the surface of the mold, effectively resisting the erosion of molten glass. For example, spraying an alumina ceramic coating on a die-casting glass mold can significantly improve the corrosion resistance of the mold in alkali-containing glass liquid and extend the service life of the mold.
Adapt to the production of different glass compositions: Different types of glass have different chemical compositions and different requirements for the corrosion resistance of molds. By selecting the appropriate thermal spray coating material, the mold can be adapted to the production of various glass components, which improves the versatility and adaptability of the mold.
Improved thermal conductivity: Certain thermally sprayed metal coatings, such as copper-based coatings, have good thermal conductivity. Spraying copper-based coating on the surface of the glass mold can speed up the heat dissipation of the mold, so that the glass liquid can be quickly cooled and formed in the mold, and the production efficiency is improved. At the same time, uniform heat dissipation also helps to reduce the stress inside the glass products and improve product quality.
Enhance thermal stability: The glass mold has to go through repeated heating and cooling cycles during the working process, which is prone to thermal fatigue. Thermal spraying coatings with thermal stability, such as nickel-chromium-aluminum alloy coatings, can improve the thermal stability of the mold, enhance the ability of the mold to resist thermal fatigue, and prolong the service life of the mold.
Fill the wear and scratch: During the use of the mold, surface defects such as wear and scratches will inevitably occur, which will affect the quality of glass products. Thermal spraying technology can fill the defects on the surface of the mold and restore the flatness and finish of the mold surface by spraying metal or ceramic materials. For example, for glass molds with scratched surfaces, the surface quality of glass products can be significantly improved after thermal spray repair.