Geometric techniques for efficient waste removal in LOM

King Wah Pang, Ajay Joneja

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)


A new CAPP system is proposed for the layered manufacturing technology of LOM (laminated object manufacturing). The traditional technique wastes much effort and time in the generation of rectangular grid patterns onto the exterior of the model to facilitate waste removal. In the proposed approach, several geometric properties of the model are exploited to dramatically reduce the waste removal grids. This, in turn, leads to reduced build time with no effect on the build quality. The proposed method uses parting planes similar to those used in mold design in regions external to the part's convex hull, and an octree decomposition in the remaining regions. An integrated CAPP system incorporating these ideas has been developed, and several example parts demonstrate the efficiencies that the system delivers.
Original languageEnglish
Pages (from-to)248-263
Number of pages16
JournalJournal of Manufacturing Systems
Issue number3
Publication statusPublished - 1 Jan 2003
Externally publishedYes


  • Computational Geometry
  • LOM
  • Octrees

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Software
  • Hardware and Architecture
  • Industrial and Manufacturing Engineering


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