Abstract
This work presents the experimental assessment of a facile and effective method for polymer welding. The setup includes a 20-cm-diameter clear crystal sphere that concentrates solar energy onto an infinitesimally small point (0.8 mm). The motion of this focal point performs the welding operation, which is controlled with good precision by a computer-numerical control (CNC) machine that lays the path and executes it. An x-y-z platform follows the desired programmed trajectory to weld the workpiece that consists of two thin sheets of polymers, one transparent and the other opaque to be joined by transmission welding. The welding process is investigated at different speeds to determine the optimum traverse rate and focal point energy density combination for a strong weld with minimal thermal damage to the substrates. The samples are studied under the microscope, and the welding strength is determined by tensile test to establish the feasibility of the process.
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