Replication of micro-structured injection molds using physical vapor deposition coating and dynamic laser mold tempering
-
Christian Hopmann
,
Nathan Kruppe
Abstract
Plastics parts with micro-structured surfaces enable the development of innovative products such as optical components in sensors or light management systems for laser and LED applications. Moreover, micro-structured parts can be utilized in the medical and packaging industry for hydrophobic or antibacterial products. The production of micro-structured parts causes challenges in molding and demolding. Rough surfaces of the laser-structured mold inserts offer flow resistance during injection phase as well as increased demolding forces which cause failures of the replicated structures during ejection. Therefore, an innovative approach combines coated mold inserts by means of physical vapor deposition (PVD) and a highly dynamic laser tempering system to improve the replication of micro-structured plastics parts. Both uncoated and coated micro-structured mold inserts were used in a series of molding experiments by means of conventional and dynamic mold tempering. Based on the results, it can be shown that significant improvements of the replication of micro-structures of different sizes can be achieved by use of PVD mold coatings. This is attributed to the tribological interactions between coating and plastics melt. Furthermore, results indicate an influence of the thermal conductivity of PVD coatings to enhance replication quality.
Acknowledgments
The depicted research has been funded by the Deutsche Forschungsgemeinschaft (DFG) as part of the program Cluster of Excellence “Integrative Production Technology for High-wage Countries” at RWTH Aachen University.
References
[1] Kuhn S, Burr A, Kübler M, Deckert M, Blesen C. J. Micromech. Microeng. 2011, 21, 1–17.10.1088/0960-1317/21/6/065031Search in Google Scholar
[2] Stormonth-Darling JM. Fabrication of difficult nanostructures by injection molding, University of Glasgow: Glasgow, Scotland, Dissertation, 2013.Search in Google Scholar
[3] Padeste C, Özçelik H, Ziegler J, Schleunitz A, Bednarzik M, Yücel D, Hasirci V. Microelectron. Eng. 2011, 88, 1836–1839.10.1016/j.mee.2010.11.051Search in Google Scholar
[4] Wang H, Liu H, Zhao Q, Cheng C, Hu W, Liu Y. Adv. Mater. 2016, 28, 624–630.10.1002/adma.201503953Search in Google Scholar PubMed
[5] Davis A, Bush RC, Harvey JC, Foley MF. SID Soc. Inform. Display 2001, 32, 934–937.10.1889/1.1832025Search in Google Scholar
[6] Christiansen AB, Clausen JS, Mortensen NA, Kristensen A. Microelectron. Eng. 2014, 121, 47–150.10.1016/j.mee.2014.03.027Search in Google Scholar
[7] Kalima V, Pietarinen J, Siitonen S, Immonen J, Suvanto M, Kuittinen M, Mönkkönen K, Pakkanen TT. Opt. Mater. 2007, 30, 285–291.10.1016/j.optmat.2006.11.046Search in Google Scholar
[8] Michaeli W, Klaiber F, Schöngart M, Beckemper S. Kunststoffe 2010, 100, 217–222.10.2174/1876402911103030222Search in Google Scholar
[9] Hansen HN, Hocken RJ, Tosello G. CIRP Ann. – Manuf. Technol. 2011, 60, 695–714.10.1016/j.cirp.2011.05.008Search in Google Scholar
[10] Sortino M, Totis G, Kuljanic E. Procedia Eng. 2014, 69, 1296–1305.10.1016/j.proeng.2014.03.122Search in Google Scholar
[11] Matschuk M, Larsen NB. J. Micromech. Microeng. 2013, 23, 025003.10.1088/0960-1317/23/2/025003Search in Google Scholar
[12] Michaeli W, Klaiber F, Scholz S. Proceedings of the 4th International Conference on Multi-Material Micro Manufacture (4M), Elsevier: Oxford, Amsterdam, 2008.Search in Google Scholar
[13] Rytka C, Kristiansen PM, Neyer A. J. Micromech. Microeng. 2015, 25, 065008.10.1088/0960-1317/25/6/065008Search in Google Scholar
[14] Brexeler I, Küls N. Werkstattstechnik 2009, 99, 830–836.10.37544/1436-4980-2009-11-12-830Search in Google Scholar
[15] Scheerer H, Hoche H, Broszeit E, Schramm B, Abele E, Berger C. Surf. Coat. Technol. 2005, 200, 203–207.10.1016/j.surfcoat.2005.02.112Search in Google Scholar
[16] Bagcivan N, Bobzin K, Brögelmann T, Kalscheuer C. Surf. Coat. Technol. 2014, 260, 347–361.10.1016/j.surfcoat.2014.09.016Search in Google Scholar
[17] Bienk EJ, Mikkelsen NJ. Wear 1997, 207, 6–9.10.1016/S0043-1648(96)07503-5Search in Google Scholar
[18] Navabpour P, Teerb DG, Hitta DJ, Gilberta M. Surf. Coat. Technol. 2006, 201, 3802–3809.10.1016/j.surfcoat.2006.06.042Search in Google Scholar
[19] Van Stappen M, Vandierendonck K, Mol C, Beekmann E, De Clercq E. Surf. Coat. Technol. 2001, 142–144, 143–145.10.1016/S0257-8972(01)01062-3Search in Google Scholar
[20] Seow LW, Lam YC. J. Mater. Proc. Technol. 1997, 72, 333–341.10.1016/S0924-0136(97)00188-XSearch in Google Scholar
[21] Ding XZ, Zeng XT, Liu YC, Fang FZ, Lim GC. Thin Sol. Films 2008, 516, 1710.10.1016/j.tsf.2007.05.019Search in Google Scholar
[22] Reiter AE, Brunner B, Ante M, Rechberger J. Surf. Coat. Technol. 2006, 200, 5532.10.1016/j.surfcoat.2005.07.100Search in Google Scholar
[23] Samani MK, Chen GCK, Ding XZ, Zheng XT. Key Eng. Mater. 2010, 447–448, 705–709.10.4028/www.scientific.net/KEM.447-448.705Search in Google Scholar
[24] Lin J, Mishra B, Moore JJ, Sproul WD. Surf. Coat. Technol. 2008, 202, 3272–3283.10.1016/j.surfcoat.2007.11.037Search in Google Scholar
[25] Reiter AE, Derflinger VH, Hanselmann B, Bachmann T, Sartory B. Surf. Coat. Technol. 2005, 200, 2114–2122.10.1016/j.surfcoat.2005.01.043Search in Google Scholar
[26] Material datasheet: Makrolon LED2245. Covestro AG, 2015.Search in Google Scholar
[27] Material datasheet: PMMA 7N. Evonic Röhm GmbH, 2015.Search in Google Scholar
[28] Osswald A, Baur E, Brinkmann S, Oberbach K, Schmachtenberg E, International Plastics Handbook, 4th ed., Carl Hanser Verlag: München, 2006.10.3139/9783446407923Search in Google Scholar
[29] Michaeli W, Schöngart M, Klaiber F, Beckemper S. 4M, International Conference on Multi-Material Micro Manufacture, Bourg en Bresse, France, 2010, Vol. 7, p 53–56.Search in Google Scholar
[30] Lin HY, Chang CH, Young WB. Int. Polym. Proc. 2011, 26, 73–81.10.3139/217.2399Search in Google Scholar
[31] Griffiths CA, Dimov SS, Scholz SG, Tosello G, Rees A. J. Manuf. Sci. Eng. 2014, 136, 1–10.10.1115/1.4026983Search in Google Scholar
[32] Uchida M, Nihira N, Mitsuo A, Toyoda K, Kubota K, Aizawa T. Surf. Coat. Technol. 2004, 177–178, 627–630.10.1016/S0257-8972(03)00937-XSearch in Google Scholar
[33] Bobzin K, Brögelmann T, Grundmeier G, de los Arcos T, Wiesing M, Kruppe NC. Surf. Coat. Technol. 2016, 308, 394–403.10.1016/j.surfcoat.2016.07.093Search in Google Scholar
©2018 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
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- Influence of particle size of isotactic polypropylene (iPP) on barrier property against agglomeration of homogenized microcrystalline cellulose (HMCC) in iPP/HMCC composites
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- Study on the adhesive properties of reactive liquid rubber toughened epoxy-clay hybrid nanocomposites
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- Long term accelerated aging investigation of an epoxy/silica nanocomposite for high voltage insulation
- Mechanical and morphological properties of modified halloysite nanotube filled ethylene-vinyl acetate copolymer nanocomposites
- Evaluation of polypropylene hybrid composites containing glass fiber and basalt powder
- Preparation and assembly
- Ibuprofen loaded nano-ethanolic liposomes carbopol gel system: in vitro characterization and anti-inflammatory efficacy assessment in Wistar rats
- Preparation of oriented bacterial cellulose nanofibers by flowing medium-assisted biosynthesis and influence of flowing velocity
- Engineering and processing
- Thin-wall injection molding of high-density polyethylene for infrared radiation system lenses
- Replication of micro-structured injection molds using physical vapor deposition coating and dynamic laser mold tempering
Articles in the same Issue
- Frontmatter
- Material properties
- Influence of particle size of isotactic polypropylene (iPP) on barrier property against agglomeration of homogenized microcrystalline cellulose (HMCC) in iPP/HMCC composites
- An investigation of the impact of an amino-ended hyperbranched polymer as a new type of modifier on the compatibility of PLA/PBAT blends
- Study on the adhesive properties of reactive liquid rubber toughened epoxy-clay hybrid nanocomposites
- Morphology, rheology and biodegradation of oxo-degradable polypropylene/polylactide blends
- Long term hydrothermal effect on the mechanical and thermo-mechanical properties of carbon nanofiber doped epoxy composites
- Long term accelerated aging investigation of an epoxy/silica nanocomposite for high voltage insulation
- Mechanical and morphological properties of modified halloysite nanotube filled ethylene-vinyl acetate copolymer nanocomposites
- Evaluation of polypropylene hybrid composites containing glass fiber and basalt powder
- Preparation and assembly
- Ibuprofen loaded nano-ethanolic liposomes carbopol gel system: in vitro characterization and anti-inflammatory efficacy assessment in Wistar rats
- Preparation of oriented bacterial cellulose nanofibers by flowing medium-assisted biosynthesis and influence of flowing velocity
- Engineering and processing
- Thin-wall injection molding of high-density polyethylene for infrared radiation system lenses
- Replication of micro-structured injection molds using physical vapor deposition coating and dynamic laser mold tempering
