This work is part of a long-term project at the WBK to develop a SLS printer which can automatically incorporate the manufactured parts with a continuous fibre-reinforcement. The investigations done here mark an early stage in the design with this thesis being the second scientific work to contribute to this project.
The objective was to develop a concept for the fibre module in the printer. Therefore, the SLS process was split into its basic steps and subfunctions, the fibre introduction was modelled on this theoretical level and all the relevant points of interaction were defined. These were fed into a morphological analysis and made up most of the parameters in the morphological box. For each parameter a set of values or technical implementations were designed and with the help of a Sintratec Kit printer the main solutions were validated. The findings of these test series led into a revise of the morphological box and this second iteration was put through a Cross-Consistency Assessment to rule out all internal contradictions and reduce the number of possible parameter combinations. Finally, the concept that provided the best ratio between highest complexity in the archivable fibre path and the lowest complexity in the technical implementation was selected and presented.
The next steps towards the final machine will be to build up the fibre module in a CAD program and design all the components. After the manufacturing and integration into a SLS printer the whole set up needs to be characterized and adequate materials have to be selected.
본 논문은 WBK의 프로젝트의 일환으로 섬유 강화 폴리머(FRP; Fibre Reinforced Polymer)를 이용한 SLS 프린터 개발을 목표로 한다. SLS 과정은 기본 단계와 하위 세부 단계로 나뉘며, 섬유 도입은 상호 작용의 모든 관련 지점에서 정의하여 이론적 수준에서 모델링하였다. 이는 형태 분석법(Morphological analysis)을 통해 형태학적 매개변수를 이용하여 구성되었고 각 매개변수에 대한 일련의 값과 Sintratec Kit 프린터의 도움으로 유효성을 검증하였다. 이를 통해 매개변수를 수정하였고 두 번째 반복은 모든 내부 모순을 배제하고 가능한 매개변수의 조합 수를 줄이기 위해 Cross-Consistency Assessment를 거쳤다. 마지막으로 섬유 경로의 가장 높은 복잡성과 기술적 구현의 가장 낮은 복잡성 사이의 비율이 가장 높은 개념을 선택하여 제시하였다. 추후 CAD 프로그램에 섬유 모듈을 구축하고 SLS 프린터를 통해 모든 구성 요소를 설계할 것이다.
