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Effect of vacuum venting and polymer composition on molding microscale features.

机译：真空排气和聚合物组成对成型微尺度特征的影响。

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摘要

The effects of vacuum venting and material parameters were investigated in the injection molding of microscale features, specifically the replication quality of microscale features. A novel tooling was employed to fabricate microcircuits in polystyrene and polymethylmethacrylate materials. The replication of feature depth in the resultant parts correlated increased with vacuum level, with vacuum venting being more important for full replication of smaller features. The effects of melt temperature, mold temperature, and injection velocity on the depth of microscale features were less significant with vacuum venting. The overall shape of the molded features was also significantly enhanced with vacuum venting. With vacuum venting, melt viscosity and the melt's ability to wet the tooling surface influenced replication of microscale features.
机译：在微型特征的注塑成型中研究了真空排气和材料参数的影响，特别是微型特征的复制质量。一种新颖的工具被用来在聚苯乙烯和聚甲基丙烯酸甲酯材料中制造微电路。最终零件中特征深度的复制与真空度相关，而真空排气对于较小特征的完全复制更为重要。真空排气时，熔体温度，模具温度和注射速度对微观特征深度的影响较小。真空排气还显着增强了成型特征的整体形状。通过真空排气，熔体粘度和熔体润湿模具表面的能力影响了微观特征的复制。

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