Abstract: A temperature measuring device for rotational molding mold was designed aimed to solving the difficulty in measuring the temperature inside the mould and the quality of plastic products. A spherical carbon brush was designed to keep the conduction in continuous rotation mold. The technology cleverly solved the major problem that the wire would rotate with the mold and selfentangled. The device had a low cost and was easy to install and dismantle. In addition, an install method for the temperature measurement device was also proposed.

Key words: rotational molding, temperature measuring device, spherical carbon brush