Application of a multilayer injection molding process for thick-walled optical components
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Christian Hopmann
Abstract
Nowadays, the injection molding of optical components is becoming more and more important. A process which constructs the injection-molded part in layers offers considerable potential for productivity increases in the manufacturing of thick-walled optical components. The so-called multilayer injection molding, also known as overmolding technology enables a considerable reduction of the normally long cycle times and improves the optical properties. It is even possible to increase the molding accuracy due to the lower shrinkage potential of the single layers. Contrary to experience, the influence of the mold temperature on the bonding strength is very low. So, the temperature control of the mold can be adapted to the process consideration in regard to optical characteristics.
Acknowledgments
The research project 16862 N of the Forschungsvereinigung Kunststoffverarbeitung was sponsored as part of the “Industrielle Gemeinschaftsforschung und -entwicklung (IGF)” by the German Bundesministerium für Wirtschaft und Energie (BMWi) due to an enactment of the German Bundestag through the AiF. We would like to extend our thanks to all organizations mentioned. Furthermore, we would like to thank the following companies for the provision of the injection molding machine and the necessary materials: Engel Austria GmbH, Schwertberg, Austria, Evonik Industries AG, Darmstadt, Germany and Bayer MaterialScience AG, Leverkusen, Germany.
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©2016 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Review
- IMKS and IMMS: two methods for the production of plastic parts featuring metallic areas
- Original articles
- Application of a multilayer injection molding process for thick-walled optical components
- Mesoscale simulation of the solidification process in injection moulded parts
- Improved molding of micro structures using PVD-coated mold inserts
- In-mould graining of 3D-shaped parts with micro-structured surfaces
- Mold technology for mass production of continuous fiber-reinforced sandwich parts
- The effect of pressure and temperature on microthermoforming thermoplastic films integrated in the injection moulding process
- Effect of filler type and composition on the mechanical, thermal, and dynamic mechanical properties of PS/SBR vulcanizate
- Improving the properties of recycled PET/PEN blends by using different chain extenders
- Effect of ABS/PMMA/EMA ternary blending sequence on mechanical properties and surface glossiness
- Fabrication of a superhydrophobic LLDPE film by thermal lamination and peeling
- Heat distortion temperature and mechanical properties of agricultural wastes-reinforced phenolic composites
- Nondestructive evaluation of graphene-based strain sensor using Raman analysis and Raman mapping
Articles in the same Issue
- Frontmatter
- Review
- IMKS and IMMS: two methods for the production of plastic parts featuring metallic areas
- Original articles
- Application of a multilayer injection molding process for thick-walled optical components
- Mesoscale simulation of the solidification process in injection moulded parts
- Improved molding of micro structures using PVD-coated mold inserts
- In-mould graining of 3D-shaped parts with micro-structured surfaces
- Mold technology for mass production of continuous fiber-reinforced sandwich parts
- The effect of pressure and temperature on microthermoforming thermoplastic films integrated in the injection moulding process
- Effect of filler type and composition on the mechanical, thermal, and dynamic mechanical properties of PS/SBR vulcanizate
- Improving the properties of recycled PET/PEN blends by using different chain extenders
- Effect of ABS/PMMA/EMA ternary blending sequence on mechanical properties and surface glossiness
- Fabrication of a superhydrophobic LLDPE film by thermal lamination and peeling
- Heat distortion temperature and mechanical properties of agricultural wastes-reinforced phenolic composites
- Nondestructive evaluation of graphene-based strain sensor using Raman analysis and Raman mapping
