Laminated glass, known for its special safety features, is widely used across various applications. With increasing market demand and diversification of product functions, the production technology and equipment for laminated glass are continuously updated and improved. The press machine, a key device in the laminated glass production process, primarily uses two types of heating methods: infrared heating and convection heating. These technologies can also be combined. However, as new products are developed and promoted, the limitations of traditional press machines in heating become apparent, necessitating equipment innovation to meet the pressing heating requirements of a variety of products.
The primary function of a press machine is to eliminate air between the glass and the PVB interlayer through heating and rolling, ensuring the quality of the finished product after high-pressure treatment. During the pressing process, the quality of glass exhaust and sealing directly affects the final product's quality. However, in actual production, due to differences in the shape, size, and structure of the glass, as well as the heating conditions inside the furnace, there are variations in the glass's heat absorption, which requires adjustments to temperature and speed to ensure the rolling effect.
Traditional press machines have limitations in the heating process, such as uneven glass heating, local overheating, or insufficient heating, all of which can affect the quality of glass exhaust and sealing. Especially for structurally complex, large panel, or heat-reflective glass, these issues are particularly pronounced. To address these problems, some manufacturers have begun to develop press machines that use fan air circulation to create forced convection heating inside the furnace. This type of equipment achieves overall uniformity of furnace temperature through air circulation, effectively avoiding the problems of local overheating and insufficient heating.
The characteristics and advantages of forced convection heating press machines are mainly reflected in the following aspects:
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Temperature Uniformity: Forced convection press machines stir the heat inside the furnace with airflow from the fan, causing heat to flow from high-temperature areas to low-temperature areas, thus maintaining uniformity of furnace temperature. This heating method effectively solves the problem of local insufficient heating or overheating in traditional press machines, improving the exhaust and sealing effect.
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Energy Saving: Forced convection heating press machines maintain high production speeds while keeping heating temperatures low. Compared to traditional press machines, these devices have significantly improved heating efficiency and production efficiency, with notable energy-saving effects.
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Product Quality Improvement: Due to the improved temperature uniformity inside the furnace, the problem of glass edge overheating is effectively controlled. This not only improves the pressing effect of general laminated glass but also effectively improves the exhaust and sealing effect of new and complex products, thereby increasing the yield and quality of finished products.
In summary, forced convection heating press machines show clear advantages in improving production efficiency, saving energy, and enhancing product quality. The application of these devices helps enterprises improve product quality, meet customer needs, and increase economic benefits. However, the production of laminated glass involves multiple processes, from cutting to edge grinding, tempering, and frit processing, and control of each process is crucial. Only through systematic scientific planning and management, ensuring the quality control of each link, can the yield and quality of finished products be further improved, enhancing the market competitiveness of enterprises, achieving energy saving and efficiency, and creating more economic and social benefits for the enterprise.
