Project Details
Projekt
FOR 702: Development of Machine, Tool and Process Technologies for New Methods to Manufacture Micro Parts via Liquid Phases
Subject Area
Mechanical and Industrial Engineering
Term
from 2006 to 2013
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 18776890
The Research Unit contributes to the development of new technologies in order to manufacture micro products via the liquid phases of polymers, metals, and ceramics. New process concepts with good prospects in the area of micro technology will be analysed in the scope of the Research Unit. Phenomena occurring specifically in the micron range will not only be coped with but moreover be availed for the shaping process.
The Research Unit investigates in particular the following technologies:
In capillary pressure die casting of metal micro parts, the effect of capillary rise is systematically used to fill micro moulds with melt. In consideration of micro specific properties of micro parts, concepts for a casting plant will be generated, which afterwards will be transferred into a prototype stage.
The plasticising of polymer resins using ultrasound has the ability to provide the small amounts of polymer melt needed for micro parts within shortest times. Research conducted in this sub-project aims at qualifying the process for different moulding materials and moreover at analysing, which conformity of the processes of ultrasonic plasticising and ultrasonic welding can be found.
Pre-compression of polymer melts in front of the cavity can provide a better filling of the mould. Especially precise reproducibility is expected from this process. In the scope of this sub-project, the technical potential of melt pre-compression will be investigated. Modelling the process allows to evaluate the melt pre-compression technique in comparison to conventional injection moulding.
The separation of a material out of aqueous electrolyte solutions can be used to produce micro parts with the help of micro-structured, partially conductive polymer moulds. The objective of investigations of this process chain is to characterise the process combinations regarding its technological and economical data and to benchmark these against alternative processes.
Another sub-project deals with research on material damage induced by the injection moulding process. These investigations will clarify whether the high surface-to-volume-ratio and the affected chemical constitution of a polymer will reduce the exploited maximum material potential.
The Research Unit investigates in particular the following technologies:
In capillary pressure die casting of metal micro parts, the effect of capillary rise is systematically used to fill micro moulds with melt. In consideration of micro specific properties of micro parts, concepts for a casting plant will be generated, which afterwards will be transferred into a prototype stage.
The plasticising of polymer resins using ultrasound has the ability to provide the small amounts of polymer melt needed for micro parts within shortest times. Research conducted in this sub-project aims at qualifying the process for different moulding materials and moreover at analysing, which conformity of the processes of ultrasonic plasticising and ultrasonic welding can be found.
Pre-compression of polymer melts in front of the cavity can provide a better filling of the mould. Especially precise reproducibility is expected from this process. In the scope of this sub-project, the technical potential of melt pre-compression will be investigated. Modelling the process allows to evaluate the melt pre-compression technique in comparison to conventional injection moulding.
The separation of a material out of aqueous electrolyte solutions can be used to produce micro parts with the help of micro-structured, partially conductive polymer moulds. The objective of investigations of this process chain is to characterise the process combinations regarding its technological and economical data and to benchmark these against alternative processes.
Another sub-project deals with research on material damage induced by the injection moulding process. These investigations will clarify whether the high surface-to-volume-ratio and the affected chemical constitution of a polymer will reduce the exploited maximum material potential.
DFG Programme
Research Units
Projects
- 2K-Mikrospritzgießen partiell leitfähiger Kunststoffformen zur gerichteten Abscheidung aus wässrigen Elektrolyten (Applicant Piotter, Volker )
- Analyse der Ultraschallplastifizierung für das Mikrospritzgießen (Applicant Hopmann, Christian )
- Entwicklung einer Fertigungstechnik (maschinentechnische Grundlagen) für Metall-Kapillardruckgießprozesse (Applicant Bach, Friedrich-Wilhelm )
- Spritzgießen von Mikrobauteilen durch Schmelzevorkompression (Applicant Ehrenstein, Gottfried W. )
- Verarbeitungsbelastung und werkstoffliche Gebrauchstauglichkeit von spritzgegossenen Mikroelementen (Applicant Ehrenstein, Gottfried W. )
Spokesperson
Professor Dr.-Ing. Dietmar Drummer, since 8/2011
