A method for producing a 3D-printed hollow structure having a smooth inner surface, and a 3D-printed hollow structure

摘要

Described is a method for producing a 3D-printed hollow structure (1) having a smooth inner surface, said method comprising the steps of:(a) providing a 3D-printed hollow structure (1) having an interior space (3) and a wall (5) at least partially enclosing said interior space (3),wherein said wall (5) has a wall inner surface (7) facing the interior space (3), and(b) applying a layer (9) of plastic material (13) to the wall inner surface (7),wherein said layer (9) has a layer inner surface (11) facing the interior space (3), andwherein said layer inner surface (11) has a lower surface roughness than the wall inner surface (7).