| abstract |
The present invention relates to a three-dimensional printing system for preparing a three-dimensional object made at least partially of an expanded polymer comprising: (i) an autoclave, (ii) a printing device for preparing an expandable polymer melt and for depositing a strand of the expandable, expanding or expanded polymer onto a surface and (iii) a three-dimensional movement device for adjusting the position of the printing device in a predefined three-dimensional matrix so as to allow to deposit the strand of expandable, expanding or expanded polymer at a predetermined time at a precise position within the three-dimensional matrix, wherein the printing device comprises: (a) a feed section, (b) a cooling section, (c) a backflow prevention section, (d) a heating section and (e) a terminal printing head section including a die for depositing the expandable, expanding or expanded polymer strand onto the surface. |