Solutions to the Problem of Briquettes Sticking to the Mold in Briquetting Press

The problem of briquettes sticking to the mold in a Briquetting Press can be addressed through several effective methods.

Proper Mold Coating

Apply a suitable mold release agent to the inner surface of the mold. This creates a thin, non - stick layer that reduces the friction and adhesion between the briquette and the mold. Commonly used release agents include PTFE - based coatings and silicone - based sprays. They can be easily sprayed or painted onto the mold surface before the briquetting process.
Consider using mold liners made of non - stick materials such as Teflon. These liners can be installed inside the mold, providing a smooth and low - adhesion surface. They are replaceable, which helps to maintain the non - stick property over time.

Optimal Material Preparation

Control the moisture content of the material. Excessive moisture can cause the briquettes to stick to the mold. Dry the material to an appropriate moisture level, which varies depending on the type of material. For example, for biomass materials, a moisture content of around 10% - 15% is often recommended.
Ensure the material has a proper particle size distribution. Uniform particle size helps in achieving better compaction and reduces the chance of material adhering to the mold due to uneven surfaces.

Mold Design and Maintenance

Optimize the mold design by increasing the draft angle. A larger draft angle makes it easier for the briquette to be ejected from the mold, reducing the force required and minimizing the risk of sticking.
Regularly clean and maintain the mold. Remove any accumulated debris, dust, or residue from the mold surface after each use. This helps to keep the surface smooth and free from any substances that could cause adhesion.

Process Parameter Adjustment

Adjust the pressure and dwell time appropriately. Excessive pressure or dwell time may cause the briquette to adhere more strongly to the mold. Experiment with different combinations of pressure and dwell time to find the optimal settings for your specific material and mold.
Control the cooling rate of the briquette after pressing. Rapid cooling can cause the briquette to contract and separate from the mold more easily, reducing the likelihood of sticking. This can be achieved by using appropriate cooling channels in the mold or by allowing sufficient air circulation around the mold.