Datum
2020-04-09Schlagwort
620 Ingenieurwissenschaften 660 Chemische Verfahrenstechnik, Technische Chemie SpritzgießenPolymereKontaktwiderstandElektrische LeitfähigkeitMetadata
Zur Langanzeige
Aufsatz
Joining of Contact Pins and Conductive Compounds via Injection Molding – Influence of the Flow Situation on the Electrical Contact Resistance
Zusammenfassung
While a lot of research can be found in the field of bulk resistance of carbon filled polymers, comparatively few papers focus on contact resistance between compound and metal contacts. Due to that small number of researches that deal with contact resistances, studies of the influence of injection molding conditions and parameters on the contact resistance are also very rare. In contradiction to that, these influences on bulk resistance have been studied. The objective of this work was to investigate the electrical contact resistance of overmolded tinplated copper contacts after modifying flow situations and molding conditions by procedural and constructional methods in contact areas. Metal pins were overmolded with a polypropylene compound containing 45 vol.% graphite, utilising an insert injection molding process. To affect the flow situation at the contacts, several processing parameters, such as mold temperature and injection speed, were modified. In addition, the contact alignment related to melt flow direction was varied. Electrical properties were studied and related to macroscopic and microscopic connection properties and flow situations in contact regions. It was found that the contact resistance is a significant factor while examining electrical resistances of overmolded samples. Furthermore, it was shown that the various flow situations had an essential impact on contact resistances. Weld lines at the position of the contact caused a decreased contact resistance. The correlation of the weld line effect, the filler orientation and contact resistance were successfully investigated by μ-CT. Regarding processing parameters, it was observed that a high mold temperature of 120 °C increased not only bulk conductivity, but also had a positive impact on contact conductivity. Macroscopic and microscopic connection mechanisms of contact surfaces were interpreted and connected to the experimental observations.
Zitierform
In: International Polymer Processing Band 35 / Heft 2 (2020-04-09) , S. 184-192 ; eissn:2195-8602Zusätzliche Informationen
Originally published at https://doi.org/10.3139/217.3879Zitieren
@article{doi:10.17170/kobra-202404119974,
author={Heim, Hans-Peter and Mieth, Florian and Schlink, André and Wiegel, Klara and Brabetz, Ludwig},
title={Joining of Contact Pins and Conductive Compounds via Injection Molding – Influence of the Flow Situation on the Electrical Contact Resistance},
journal={International Polymer Processing},
year={2020}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2020$n2020 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/15806 3000 Heim, Hans-Peter 3010 Mieth, Florian 3010 Schlink, André 3010 Wiegel, Klara 3010 Brabetz, Ludwig 4000 Joining of Contact Pins and Conductive Compounds via Injection Molding – Influence of the Flow Situation on the Electrical Contact Resistance / Heim, Hans-Peter 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/15806=x R 4204 \$dAufsatz 4170 5550 {{Spritzgießen}} 5550 {{Polymere}} 5550 {{Kontaktwiderstand}} 5550 {{Elektrische Leitfähigkeit}} 7136 ##0##http://hdl.handle.net/123456789/15806
2024-06-03T10:34:07Z 2024-06-03T10:34:07Z 2020-04-09 doi:10.17170/kobra-202404119974 http://hdl.handle.net/123456789/15806 Originally published at https://doi.org/10.3139/217.3879 eng Urheberrechtlich geschützt https://rightsstatements.org/page/InC/1.0/ 620 660 Joining of Contact Pins and Conductive Compounds via Injection Molding – Influence of the Flow Situation on the Electrical Contact Resistance Aufsatz While a lot of research can be found in the field of bulk resistance of carbon filled polymers, comparatively few papers focus on contact resistance between compound and metal contacts. Due to that small number of researches that deal with contact resistances, studies of the influence of injection molding conditions and parameters on the contact resistance are also very rare. In contradiction to that, these influences on bulk resistance have been studied. The objective of this work was to investigate the electrical contact resistance of overmolded tinplated copper contacts after modifying flow situations and molding conditions by procedural and constructional methods in contact areas. Metal pins were overmolded with a polypropylene compound containing 45 vol.% graphite, utilising an insert injection molding process. To affect the flow situation at the contacts, several processing parameters, such as mold temperature and injection speed, were modified. In addition, the contact alignment related to melt flow direction was varied. Electrical properties were studied and related to macroscopic and microscopic connection properties and flow situations in contact regions. It was found that the contact resistance is a significant factor while examining electrical resistances of overmolded samples. Furthermore, it was shown that the various flow situations had an essential impact on contact resistances. Weld lines at the position of the contact caused a decreased contact resistance. The correlation of the weld line effect, the filler orientation and contact resistance were successfully investigated by μ-CT. Regarding processing parameters, it was observed that a high mold temperature of 120 °C increased not only bulk conductivity, but also had a positive impact on contact conductivity. Macroscopic and microscopic connection mechanisms of contact surfaces were interpreted and connected to the experimental observations. open access Heim, Hans-Peter Mieth, Florian Schlink, André Wiegel, Klara Brabetz, Ludwig doi:10.3139/217.3879 Spritzgießen Polymere Kontaktwiderstand Elektrische Leitfähigkeit publishedVersion eissn:2195-8602 Heft 2 International Polymer Processing 184-192 Band 35 false
Die folgenden Lizenzbestimmungen sind mit dieser Ressource verbunden:
:Urheberrechtlich geschützt