| 摘要 |
A three-dimensional printing system comprising a print head vertically arranged above a build platform, said print head having a variable-width nozzle with a rectangular opening having a size, a means of moving said print-head and a means for extruding pellets through said variable-width nozzle to provide a molten ribbon vertically above said build platform, said pellets comprising at least one polymer, said extrusion means incorporating a heated chamber before said nozzle and said variable-width nozzle incorporating an actively controlled gate; and a three-dimensional printing process, said process comprising the steps of: extruding pellets through a rectangular variable-width nozzle incorporating an actively controlled gate to provide a molten ribbon vertically above a build platform to provide a body, said pellets comprising at least one polymer. |
