ASSESSING THERMAL VARIATION IN BENCH AND CAROUSELTYPE PRODUCTION TOOLS

ABDUL-RANI M., AHMAD F, MURAD N.
2008 The International Conference on Applied Mechanics and Mechanical Engineering  
Uniform mould temperature is very much desired in foam production tools. Mould temperature variation can result in low part quality. It is suspected that uniform mould temperature is not achieved during foam moulding process. A series of experiments was conducted to assess production tools' mould surface temperature. The work was performed to quantify any temperature variations in existing production tools. It was also intended as a preliminary inspection of any effects on flexible PU foam part
more » ... exible PU foam part quality resulting from tool temperature variations. Experiments were conducted on bench and carousel-type moulds at an industrial plant using non-contact and contact technique to measure and quantify the mould surface temperature. A grid of locations and features on the mould surface are identified and temperature recordings were conducted a number of times for each spot. Distance between mould surface and heating channels for each spot are also noted. It was found that there exists a mould surface temperature variation between 4 0 C to 8 0 C on some parts of the mould surface. The locality where the mould surface was lower coincided with a negative effect on the final part such as scaling and shrinks mark. It was established through experimental results that the mould surface temperature was affected by the distance from the heating channel to the mould surface. Consequently a uniform distance between heating channel and mould surface was proposed to be incorporated in the design of future production tools to attain a uniform mould surface temperature.
doi:10.21608/amme.2008.39417 fatcat:rkey47zrrvghfpeuuyorwpn5l4