1014 DLC表面改質による射出成形金型の離型性改善(基調講演,関東支部茨城講演会)

概要

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The thickness of plastic product is getting thinner under the environmental correspondence, cycle up for productivity and cost competition. However it causes many molding problems such as scratch mark, distortion and remaining in the cavity. These problems come from the mold design, mold temperature, cavity pressure and cavity surface condition. The product with thinning wall and light weighting need bigger mold release force than the ordinary product when the mold opening and ejection. Reducing the mold release force by the mold surface improvement makes the constant and stable production. Surface modification technology based on the metallic material especially DLC (Diamond Like Carbon) is one of the solutions. We studied the friction coefficient between DLC and PMMA resin under the different temperature and observed the surface condition in a micro viewpoint. It is possible to reduce the mold release force and cavity pressure using the surface fluency, hardness and non-adhesion related of DLC.
2005-09-08