Structure

• Heating Chamber: This is the core part where the porcelain-fused-to-metal restoration is placed for firing. It is designed to provide a uniform and precise temperature environment to ensure the proper fusion of porcelain to the metal framework.
• Heating Elements: Usually made of high-quality resistance wires or other advanced heating materials, they are responsible for generating heat. They are evenly distributed around the heating chamber to achieve uniform heating.
• Temperature Control System: Composed of temperature sensors and controllers, it can accurately measure and control the temperature inside the furnace. It allows technicians to set specific temperature profiles and ramping rates according to the requirements of different porcelain materials and processing procedures.
• Insulation Layer: Surrounding the heating chamber, the insulation layer is made of heat-resistant and insulating materials. It helps to reduce heat loss, improve energy efficiency, and maintain a stable temperature inside the furnace.
• Door and Sealing System: The door of the furnace is equipped with a reliable sealing device to ensure that the heating chamber is airtight. This is crucial for preventing heat leakage and maintaining the stability of the internal temperature and atmosphere during the firing process.

Working Principle

• The porcelain-fused-to-metal dental furnace operates based on the principle of resistive heating. When an electric current passes through the heating elements, they generate heat due to electrical resistance. The heat is then transferred to the heating chamber, raising the temperature inside. The temperature control system continuously monitors and adjusts the temperature to follow the pre-set heating curve. During the firing process, the porcelain powder applied to the metal framework melts and fuses with the metal under the appropriate temperature and time conditions, forming a strong and durable bond.

Functions and Advantages

• Precise Temperature Control: It can achieve high-precision temperature control, usually with an accuracy of ±1°C or even higher. This ensures that the porcelain is fired under the exact temperature conditions required, resulting in consistent color, gloss, and physical properties of the porcelain restoration.
• Uniform Heating: The design of the heating elements and the heating chamber ensures uniform heat distribution, preventing local overheating or underheating. This is essential for producing porcelain restorations with uniform thickness and no cracks or deformities.
• Multiple Heating Programs: Most modern dental furnaces are equipped with a variety of pre-programmed heating cycles to meet the needs of different porcelain materials and restoration types. Technicians can also customize heating programs according to specific requirements, providing great flexibility in the fabrication process.