Air tack device for preparing airplane carbon brake plate by utilizing internal heat gradient directional airflow CVI (chemical vapor infiltration) method

The utility model discloses an air tack device for preparing an airplane carbon brake plate by utilizing an internal heat gradient directional airflow CVI (chemical vapor infiltration) method. The air tack device comprises a first graphite outer barrel, a second graphite outer barrel and a graphite cover plate, wherein the second graphite outer barrel is installed on the upper end of the first graphite outer barrel, the graphite cover plate is installed on the inner wall of the second graphite outer barrel, the graphite cover plate is provided with an installation hole for a graphite heating body to pass through, the second graphite outer barrel and the graphite cover plate are integrally formed, and the graphite cover plate is provided with a heat-preserving carbon fiber felt. By adopting the air tack device, the problems such as complexity in sealing operation, untightness in sealing, likeliness in air leakage and the like between the existing graphite cover plate and the graphite outer barrel can be overco