Computer design and simulation of the sprue system
3D CAD models were developed for investigation of the influence of the sprue system geometry on the process of optical disc moulding using computer simulation. The main purpose of the present work is to develop models that allow easy change of the geometry shape and dimensions of the sprue system. The 3D CAD model of the sprue system was built as a combination of the polymer substrate and the sprue system, considered as one object. This approach allows achieving a precise design of the sprue system, before to import the 3D CAD model in the computer simulation software. By means of simulation software the proposed 3D models were verified. Three different variants of the sprue system design were defined and two parameters were chosen as variables: D1 (the gate length), D2 (the gate depth). By means of iterative steps in the frame of the mould filling simulation, an optimal variant for the gate geometry and for the processing parameters was obtained.
Hi Maria.
Thanks for your interest. The 3D CAD models of the spue system could be used in order to estimate the parameters D1,D2,D3,D4,D5 and D7 for a concrete study. In the present work we made only a primary verification and investigation of the advantages of the 3D CAD models. By our opinion the gate length D1 and the gate depth D2 are the main important parameters of the gate system in respect to the influence on the mold cavity filling process. The other parameters like D3, D4, D5 and D7 are also significant but on second place. All of the above specified parameters will be chosen as variables in our current work with more powerful simulation program (Molflow Plastics Insight).
Best Regards
Trifonov, Toshev
Dear authors,
Thanks for the well-written paper. What i concerned is the selection of variable parameters. Could you explain why D1 and D2 were chosen while the melt distribution area D4, the sprue draft D5 or the sprue radius of roundness D7 were not considered as parameters for experiment?
regards
Maria