4M Knowledge base - papers
D. S. Trifonov (a), Y.E. Toshev (b)
(a) Institute of information Technology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
(b) Institute of Mechanics and Biomechanics, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
The present paper offers 3D CAD models of the gate system of an optical disc mould that are developed. The type of the gate system is known as a “Krauss Maffei” system, in which the central hole of the polymer substrate is formed by breaking off the circle gate from the polymer substrate. The gate depth and the gate position are defined as variable parameters and combined with different variants of the processing conditions in mould filling simulation. A range of improved variants of all the variable parameters is obtained with the help of iterative steps within the frame of the simulation code. A modified gate system is proposed in the process of research, which allows a gate with a larger depth parameter to be used. The modified system allows also alteration of the gate position with respect to the central hole. The best results are achieved, using the proposed modified gate system in the case, when a gate with a larger depth is used and the gate position is located symmetrically towards the central hole.
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