Laminated Object Manufacturing

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Laminated Object Manufacturing (LOM) is a manufacturing process from the field of rapid prototyping , with which a workpiece is built up in layers from paper.

Schematic diagram: New film is laid out layer by layer from a roll (a) and cut off (c). A movable head (b) is used to laminate where the object is to be created. The platform with the object to be produced (d) moves slowly downwards, non-laminated film (e) remains on the platform to support the component and is removed in a post-processing step.

principle

The shape is built from layers of paper (experiments are also carried out with foils made of ceramic , plastic or aluminum ). Each new layer is laminated to the existing layer and then the contour cut (using a knife , hot wire or laser ). Then the next layer is applied, etc.

features

  • Existing 3D CAD data are converted into STL format . This data is supplemented by the necessary cutting lines to enable the workpiece to be unpacked after production.
  • Achievable assembly times around 2–4 mm / hour (depending on the complexity of the geometry).
  • The tolerances for paper reach DIN 2768 medium.
  • Layer thicknesses for paper 80 to 150 µm.
  • Wall thickness from 2 mm, unlimited upwards.

Costs for system with DIN A4 production format around 65,000 euros (as of 2004)

application

Applications are display models, casting models and the like. Ä.