The laminated Object Manufacturing (LOM) process can produce a complex geometrical prototype with less material cost and energy consumption than conventional manufacturing methods. It uses laminated kraft paper as the raw material. The laser cuts the contours and grids; a heated roller activates the glue and pastes it over another layer.

Bohmer [1] says that the ignition temperature of paper is 450ºC, and the flashing temperature is 350ºC. Ramsay and Richardson [2] and Ainsworth [3] estimated that the temperature at the focal point of the laser beam is 1600-2000ºC when laser cutting paper material. This temperature range is much higher than the ignition temperature of paper material. [1,2,3]

 Based on the above literature, we have conducted preliminary experiments on different materials and how CO2 Laser reacts with them. For cutting the different materials using a CO2 laser, we don't need to optimize its power. We must ensure enough power is there to melt and vaporize the material. But apart from cutting the material, we can also use the same Laser to glue the material.

The performance of glued part is mainly controlled by many process parameters such as scanning speed, scanning pattern, scanning strategy, and layer thickness. Usually, these parameters are optimized through detailed experiments, which are time-consuming and costly. Therefore, numerical methods have been adopted to investigate the effects of these process parameters on temperature fields and thermal stress fields. As the Laser introduces huge temperature gradients within the irradiated region, which will result in the distortion and even delamination of solidified layers, the study of the history of temperature distribution is the essential and crucial step in the modeling of gluing process.