Focused on the field of high-temperature-resistant polyimide (PI) composite materials.
Optimization of the thermal insulation system for rubber flat-plate hot presses: controlling the thermal conductivity has become a key technical focus.
Mar 27,2026
Optimizing the thermal insulation system of rubber flat-plate hot presses is a critical step in enhancing production efficiency and product quality, with precise control of the thermal conductivity coefficient emerging as the technical focal point. Conventional insulation materials tend to experience degraded thermal performance and insufficient structural stability under high-temperature and high-pressure conditions, leading to substantial heat loss that compromises mold temperature uniformity and the forming quality of rubber products.
Currently, the core of optimizing thermal insulation systems lies in the adoption of novel multilayer composite insulation panels. These materials achieve a balance between a low thermal conductivity—typically below 0.3 W/m·K—and high compressive strength—up to 800 MPa—by appropriately combining high-temperature-resistant resins, alkali-free glass fabrics, and composite reinforcing materials. The multilayer design effectively disrupts heat transfer pathways, minimizing unnecessary heat loss, thereby ensuring more uniform temperatures across the mold’s working surface and enhancing the dimensional stability and surface finish of rubber products.
In terms of thermal conductivity control, it is essential to ensure strict alignment between the material’s temperature resistance range and process requirements. For instance, when dealing with rubber vulcanization temperatures—typically 150–200°C—it is necessary to select insulation materials with a higher temperature rating to prevent performance degradation at elevated temperatures. At the same time, optimizing the thickness of the insulation panels (generally adjustable between 3 and 30 mm) and their flatness (with a tolerance of ±0.05 mm) can further minimize thermal bridging, thereby ensuring long-term, stable insulation performance. In addition, integrating an automated temperature-control system with a coolant circulation unit enables dynamic adjustment of mold temperature, reducing heating time and energy consumption and creating a synergistic optimization solution that balances insulation and heat dissipation.
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