Utilizing of inner porous structure in injection moulds for application of special cooling method

International Conference on Microtechnology and Thermal Problems in Electronics 2015; International Conference on Smart Engineering of New Materials 2015

Seidl, M.^1 ; Bobek, J.^1 ; Šafka, J.^2 ; Habr, J.^1 ; Nováková, I.^2 ; Bhálek, L.^1

Department of Engineering Technology, Technical University of Liberec, Czech Republic^1

Laboratory of Prototype Technologies and Processes, Technical University of Liberec, Czech Republic^2

关键词: Component structure;    Cooling efficiency;    Dimensional accuracy;    Dimensional analysis;    Experimental devices;    Intensive cooling;    Moulding technology;    Semi-crystalline polymer;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/709/1/012003/pdf
DOI  :  10.1088/1742-6596/709/1/012003

来源: IOP

【 摘 要 】

The article is focused on impact evaluation of controlled inner structure of production tools and new cooling method on regulation of thermal processes for injection moulding technology. The mould inserts with porous structure were cooled by means of liquid CO2which is very progressive cooling method and enables very fast and intensive heat transfer among the plastic product, the production tool and cooling medium. The inserts were created using rapid prototype technology (DLSM) and they had a bi-component structure consisting of thin compact surface layer and defined porous inner structure of open cell character where liquid CO2was flowing through. This analyse includes the evaluation of cooling efficiency for different inner structures and different time profiles for dosing of liquid CO2into the porous structure. The thermal processes were monitored using thermocouples and IR thermal analyse of product surface and experimental device. Intensive heat removal influenced also the final structure and the shape and dimensional accuracy of the moulded parts that were made of semi-crystalline polymer. The range of final impacts of using intensive cooling method on the plastic parts was defined by DSC and dimensional analyses.