| 摘要 |
<p>PROBLEM TO BE SOLVED: To control influence of external environment on a temperature of a melting region of a thermoplastic resin.SOLUTION: A three-dimensional shaping head 20 comprises a thermal insulation member 30, a light emitting unit 34, a tubular member 36 and a light extinction member 38. The thermal insulation member 30 is provided with a sealed space 32 inside having a curved wall surface 33 reflecting light. At least a light emission surface F of the light emitting unit 34 emitting light is provided in the sealed space 32. The tubular member 36 is arranged to penetrate the thermal insulation member 30 through the sealing space 32, and is long in a first direction D1 ejecting a thermoplastic resin 18. The light extinction member 38 absorbs light. The extinction member 38 is provided close to at least a part of the tubular member 36 inside the sealed space 32. Besides, the light extinction member 38 is provided in a region including a condensation position O at which at least a part of light emitted from the light emitting unit 34 inside the sealed space 32 condenses by being reflected by the wall surface 33.</p> |
