Influence on Product Quality by pvT-Optimised Processing in Injection Compression Molding
-
Ch. Hopmann
Abstract
The production of functional optical parts made of plastics is a growing market and the associated production processes have to be developed to fulfil the increasing quality requirements. In this paper an alternative injection compression molding process using the pvT-behavior of the plastics material is compared to the conventional processing method using an isobaric process path. For both control strategies a cavity pressure loop-control is implemented and used. According to measurements of the mold surface reproduction accuracy and internal properties of the molded part the processing method using the pvT-behavior results in a higher optical part quality in the same cycle time compared to the isobaric processing method.
References
Agrawal, A. R., Pandelidis, I. O. and Pecht, M., “Injection-Molding Process Control – A Review”, Polym. Eng. Sci., 18, 1345–1357 (1987) 10.1002/pen.760271802Search in Google Scholar
Ballman, P., Shusman, R.: Easy Ways to Calculate Injection Molding Set-Up, Modern Plastics, McGraw-Hill, New York (1959)Search in Google Scholar
Bluhm, R., “Verbesserte Temperaturkontrolle beim Kunststoffspritzgießen”, PhD Thesis, RWTH Aachen, Aachen (1996)Search in Google Scholar
Bongardt, W., “Verbesserte Prozeßführung durch selbsteinstellende Regelungen”, PhD Thesis, RWTH Aachen, Aachen (1982)Search in Google Scholar
Brockmann, C. M., “Spritzprägen technischer Thermoplastformteile, PhD Thesis, RWTH Aachen, Aachen (1998)Search in Google Scholar
Brockmann, C. M., Michaeli, W., “Injection Compression Molding – A Low Pressure Process for Manufacturing Textile-Vovered Moldings”, Proceedings of the 55th Annual Technical Conference (ANTEC) of the Society of Plastics Engineer (SPE), Toronto, Canada (1997)Search in Google Scholar
Bürkle, E., Klotz, B. and Schnerr, O., “Transparent Pressure”, Kunststoffe International, 5, 10–14 (2007)Search in Google Scholar
Bürkle, E., “Neue maschinentechnische Optionen bei der Herstellung von Kunststoffoptiken”, Proceedings of the 24th International Plastics Technology Colloquium, Aachen (2008)Search in Google Scholar
Chang, R. Y., Chen, C. H. and Su, K. S.: Modifying the Tait Equation with Cooling-Rate Effects to Predict the Pressure-Volume-Temperature Behaviors of Amorphous Polymers: Modeling and Experiments”, Polym. Eng. Sci., 36, 1789–1795 (1996) 10.1002/pen.10574Search in Google Scholar
Chen, Z., Turng, L., “A Review of Current Developments in Process and Quality Control for Injection Molding”, Adv. Polym. Technol., 3, 165–182 (2005) 10.1002/adv.20046Search in Google Scholar
Fischer, J.: Handbook of Molded Part Shrinkage and Warpage, Elsevier Science, Waltham, Oxford (2012)10.1016/B978-1-4557-2597-7.00002-1Search in Google Scholar
Hopmann. Ch., Walach. P., “Precision Replication of Plastics Optics by Injection-Compression Molding”, Proceedings of the 3rd International Molded Optics Conference (iMOC), Bremen (2012)Search in Google Scholar
Isayev, A. I., Lin, T., “Frozen-In Birefringence an Anisotropic Shrinkage in Optical Moldings: 1. Theory and Simulation Scheme”, Polymer, 1, 316–327 (2010) 10.1016/j.polymer.2009.11.006Search in Google Scholar
Knappe, W., Lampl.A., “Zum optimalen Zyklusverlauf beim Spritzprägen von Thermoplasten”, Kunststoffe, 2, 79–83 (1984)Search in Google Scholar
Lee, Y. B., Kwon, T. H. and Yoon, K., “Numerical Prediction of Residual Stresses and Birefringence in Injection/Compression Molded Center-Gated Disk. Part II: Effects of Processing Conditions”, Polym. Eng. Sci., 42, 2273–2292 (2002) 10.1002/pen.11114Search in Google Scholar
Matzke, A., “Prozeßrechnereinsatz beim Spritzgießen”, PHD Thesis, RWTH Aachen, Aachen (1985)Search in Google Scholar
Menges, G., Schmidt, L., Kemper, W. and Storzer, A., “Rechnerische Beschreibung von Abkühlvorgängen”, Plastverarbeiter, 3, 133–136 (1980)Search in Google Scholar
Michaeli, W., Hopmann, C., Heßner, S. and Walach, P., “Injection-Compression Molding of Aspherical Plastics Lenses”, J. Plast. Technol., 3, 115–136 (2011)Search in Google Scholar
Michaeli, W., Schreiber, A., “Online Control of the Injection Molding Process Based on Process Variables”, Adv. Polym. Technol., 2, 65–76 (2009) 10.1002/adv.20153Search in Google Scholar
Müller.W., “Kunststoffoptik mit hoher funktioneller Integration”, Kunststoffe, 1, 49–52 (2004)Search in Google Scholar
Nunn, R. E., Grolman, C. P., “Adaptive Process Control for Injection Molding”, J. Reinf. Plast. Compos., 9, 282–298, (1990) 10.1177/073168449000900307Search in Google Scholar
N.N., “DIN ISO 10110-1: Optik und Photonik – Erstellung von Zeichnungen für optische Elemente und Systeme – Teil 1: Allgemeines”, Berlin, Beuth Verlag (2007)Search in Google Scholar
N.N., Photonik – Branchenreport – Aktuelle Lage – Februar 2014. Druckschrift, Bundesministerium für Bildung und Forschung (BMBF) gemeinsam mit den Verbänden SPECTARIS, VDMA, ZVEI. Berlin, Düsseldorf, Frankfurt am Main, 2014Search in Google Scholar
Schmidt, T. W., Menges, G., “Calculation of the Packing Phase in Injection Molding with a Two-Layer Segment Model”, Proceedings of the 44th Annual Technical Conference (ANTEC) of the Society of Plastics Engineer (SPE), Boston, USA (1986)Search in Google Scholar
Schmidt, T. W., “Zur Abschätzung der Schwindung”, PhD Thesis, RWTH Aachen, Aachen (1986)Search in Google Scholar
Schreiber, A., “Regelung des Spritzgießprozesses auf Basis von Prozessgrößen und im Werkzeug ermittelter Materialdaten”, PhD Thesis, RWTH Aachen, Aachen (2011)Search in Google Scholar
Stricker, M., Pillwein, G. and Giessauf, J., “Präzision im Fokus – Spritzgießen optischer Formteile”, Kunststoffe, 4, 30–34 (2009)Search in Google Scholar
Tait, P. G., “On Some of the Physical Properties of Fresh Water and Of Sea-Water. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the Years 1873–1876”, Physics and Chemistry, 2, 1–76 (1889)Search in Google Scholar
Thonemann, O. E., “Die Herstellung optischer Linsen im ?Spritz-Präge-Verfahren“ aus Polymethacrylat”, Plastverarbeiter, 9, 619–626 (1967)Search in Google Scholar
Tsai, K., Hsieh, C. and Lo, W., “A Study of the Effects of Process Parameters for Injection Molding on Surface Quality of Optical Lenses”, J. Mater. Process. Technol., 1, 3469–3477 (2009) 10.1016/j.jmatprotec.2008.08.006Search in Google Scholar
Walther, T., Müller, R.-U., “For True Insight”, Kunststoffe International, 10, 40–43 (2009)Search in Google Scholar
Wang, J., Mao, Q., “A Novel Process Control Methodology Based on the PVT Behavior of Polymer for Injection Molding”, Adv. Polym. Technol., 32, 474–485 (2013) 10.1002/adv.21294Search in Google Scholar
Wang, K. K., Zhou, J. and Sakurai, Y., “An Integrated Adaptive Control for Injection Molding”, Proceedings of the 57th Annual Technical Conference (ANTEC) of the Society of Plastics Engineer (SPE), New York, USA (1999)Search in Google Scholar
Wübken, G., “Einfluss der Verarbeitungsbedingungen auf die innere Struktur thermoplastischer Spritzgussteile unter besonderer Berücksichtigung der Abkühlverhältnisse”, PhD Thesis, RWTH Aachen, Aachen (1974)Search in Google Scholar
Zöllner, O., “Kunststoffoptiken in Mehrschichtspritzguß”, PhD, Universität Erlangen-Nürnberg, Leverkusen (2012)Search in Google Scholar
Zoetelief, W. F., Douven, L. F. A. and Housz, A. J. I., “Residual Thermal Stresses in Injection Molded Products”, Polym. Eng. Sci., 36, 1886–1896 (1996) 10.1002/pen.10585Search in Google Scholar
© 2016, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- Research and Application of Wireless Temperature Measurement Device in High Temperature Enclosed Environment
- Influence on Product Quality by pvT-Optimised Processing in Injection Compression Molding
- Effect of Plug Temperature on the Strain and Thickness Distribution of Components Made by Plug Assist Thermoforming
- Influence of Processing Parameters and Composition on the Effective Compatibilization of Polypropylene–Poly(ethylene terephthalate) Blends
- Impact Modification of Isotactic Polypropylene with Ethylene-Propylene Diene Monomer Rubber
- Impact Behavior of Continuous Biaxial Reinforced Composites Based on Bio-Polyamides and Man-Made Cellulose Fibres
- Preparation and Anti-Fouling Property of Acryloylmorpholine-Grafted PVDF Membrane: The Effect of Cross-Linking Agent
- Fine Filament Formation Behavior of Polymethylpentene and Polypropylene near Spinneret in Melt Blowing Process
- Fracture Toughness of PP/EPDM/Nano-Ternary Composites: The Role of Distribution of Inorganic Particles
- CO2 Laser Ablation of Microchannel on PMMA Substrate for Effective Fabrication of Microfluidic Chips
- A Novel Micro Wall Slip Model Based on Chain Length and Temperature
- Electrical and Mechanical Properties of Antistatic Poly(vinyl chloride) Composites Filled with Silver Plated Hollow Glass Microspheres
- Prototype System to Study the Effect of Weld Lines on the Performance of Extruded Profiles
- Extrudate Swell of High Density Polyethylenes in Slit (Flat) Dies
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- Research and Application of Wireless Temperature Measurement Device in High Temperature Enclosed Environment
- Influence on Product Quality by pvT-Optimised Processing in Injection Compression Molding
- Effect of Plug Temperature on the Strain and Thickness Distribution of Components Made by Plug Assist Thermoforming
- Influence of Processing Parameters and Composition on the Effective Compatibilization of Polypropylene–Poly(ethylene terephthalate) Blends
- Impact Modification of Isotactic Polypropylene with Ethylene-Propylene Diene Monomer Rubber
- Impact Behavior of Continuous Biaxial Reinforced Composites Based on Bio-Polyamides and Man-Made Cellulose Fibres
- Preparation and Anti-Fouling Property of Acryloylmorpholine-Grafted PVDF Membrane: The Effect of Cross-Linking Agent
- Fine Filament Formation Behavior of Polymethylpentene and Polypropylene near Spinneret in Melt Blowing Process
- Fracture Toughness of PP/EPDM/Nano-Ternary Composites: The Role of Distribution of Inorganic Particles
- CO2 Laser Ablation of Microchannel on PMMA Substrate for Effective Fabrication of Microfluidic Chips
- A Novel Micro Wall Slip Model Based on Chain Length and Temperature
- Electrical and Mechanical Properties of Antistatic Poly(vinyl chloride) Composites Filled with Silver Plated Hollow Glass Microspheres
- Prototype System to Study the Effect of Weld Lines on the Performance of Extruded Profiles
- Extrudate Swell of High Density Polyethylenes in Slit (Flat) Dies
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts