| 摘要 |
PURPOSE: A heating furnace is provided to prevent leakage of inside heat or an inflow of outside air through a gap between an extraction door and an extraction stage because the extraction door can adhere closely to the extraction stage during opening or closing of the extraction door. CONSTITUTION: A heating furnace comprises a body(10), an extraction door(20), an extraction door driver part, a close adhering guide part(100), and a control unit. The body includes an extraction hole part which extracts a material and is installed at an extraction end(12). Both end parts of the extraction door are curved and the extraction door surrounds both edges of the extraction stage. The extraction door opens and closes the extraction hole part. The extraction door driver part moves the extraction door up and down. The close adhering guide part is installed at the extraction end, and draws the extraction door to the extraction stage by generating an electromechanical power. The control unit controls an operation of the extraction door driver part and the close adhering guide part. |
