Patent ID: 11865736
Assignee: CIVIL AVIATION FLIGHT UNIVERSITY OF CHINA
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 5:
6. The perforating device for thermoplastic plates according to claim 1, wherein each of the reflective heat focusing hoods comprises a top cover, a middle part of the top cover is a circular surface, and an upper ring is arranged below the circular surface and hinged with a plurality of inner reflective plates and outer reflective plates, the inner reflective plates and the outer reflective plates are alternately arranged around the upper ring, there is an overlap between the inner reflective plates and the adjacent outer reflective plates, and the inner reflective plates are arranged under the outer reflective plates; each of the inner reflective plates is fixed with a secondary steel wire rope on a bottom part thereof, all the secondary steel wire rope gather in the middle of the top cover and then form a main steel wire rope, the main steel wire rope is attached to a capstan, a lower ring is arranged below the upper ring, the lower ring and the upper ring keep static with respect to the top cover, the diameter of the lower ring is larger than the upper ring, at least one return spring is arranged on each of the outer reflective plate, one end of the return spring is fixed with the outer reflective plate, the other end of the return spring is fixed with the lower ring.