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Konferenzveröffentlichung
The Effect of Injection Molding Parameters on Microcellular Foam Morphology
(2021)
Microcellular foam injection molding with physical blowing agent (MuCell®) delivers monetary benefits, processing advantages and freedom of product design by reducing shrinkage. In conjunction with an advanced mold technology, so-called Pull and Foam method, there is great potential in controlling the foam structure of the component locally. In this study, Polycarbonate (PC) components were produced with nearly compact outer skin and a closed cellular core. To understand the relation between processing parameters and ...
Konferenzveröffentlichung
Blending CA with PBS to increase the bonding strength in two-component injection molding
(Society of Plastics Engineers, 2019)
Since CA shows no adhesive properties in the two-component injection molding process with bio based TPU, blends of CA and PBS were produced to decrease the interfacial tension between the materials. While the interfacial tension was calculated from the results of a drop shape analysis, the adhesion strength was measured in peel tests according to the guideline VDI 2019. The comparison of the results gave information about whether the drop shape analysis is a valid method to analyze the adhesive characteristics of ...
Konferenzveröffentlichung
Formation of morphology as a function of process control by foam injection molding of a functionally graded component
(Society of Plastics Engineers, 2014)
A special mold technology enables the production of foam injection molded components with locally differing foaming ratios. Thus, components with functionally graded foam structures can be produced in one processing step. The method (pull and foam method) is based on the idea of creating components with thin-walled areas with a high surface quality and partially foamed, thick-walled areas (e.g. with the function of integrated structural elements) in a controlled foaming process. This paper describes the characteristics ...
Konferenzveröffentlichung
Changeable Thermal Management for LED-Lighting
(Society of Plastics Engineers, 2015)
Thermal management of LED lights can be arranged by deliberately influencing lighting components conduction capabilities and reducing the thermal contact resistance for various joining processes. The research details the possibilities thereof and shows the thermal contact resistance of plastic and
Konferenzveröffentlichung
Development of a Radian Friction Welding Machine Using the Circular Process with Limited Rotational Motion
(Society of Plastics Engineers, 2013)
The processing-technological limitations of components which can not be continuously rotated, either due to their length or marginal protrusions, make the realization of several potential applications using rotation welding unthinkable. The difficulties that arise while generating a high quality weld and are caused by large component tolerances and component warping are known. In order to extend the potential of friction welding, it is necessary to develop a new welding technology. In cooperation with Fischer ...
Konferenzveröffentlichung
Flexible Foams made of Liquid Silicone Rubber and expandable Microspheres
(2019-10-02)
In this study, the possibility of foaming liquid silicone rubber (LSR) was investigated. The foam was produced by injection molding with two different thermoplastic, expandable microspheres. Different properties were tested using the S2-tensile bar, e.g. density, tensile strength, specific tensile strength, elongation at break, stress at 100 % strain and the hardness. It was found that the two types of microspheres used have similar effects on density, specific tensile strength and elongation at break, but differ in ...
Konferenzveröffentlichung
Hybrid composite materials made of polypropylene with wood and polyethylene terephthalate fibers
(Society of Plastics Engineers, 2014)
We aim to manufacture injection molded components which consist of thermoplastics reinforced with fibers and which have improved properties (high strength and high notched impact strength). Thus, we intend to access new application fields for the not readily visible area of the automobile interior.
Konferenzveröffentlichung
Characterizing the Rheological Behavior of Liquid Silicone Rubber Using a High Pressure Capillary Rheometer
(Society of Plastics Engineers, 2016)
The injection molding process of liquid silicone rubber (LSR) imposes high demands on the injection molding machines and the tools due to the low viscosity of silicone rubber. There is very little data which describes the rheological behavior of LSR and its influencing factors across a range of shear rates.
In this study, the rheological behaviors of different types of LSR were characterized using a high pressure capillary rheometer with an apparent shear rate that ranged from 350 to 4000 1/s. In order to identify ...
Konferenzveröffentlichung
Effects of the Cellular Morphology on Fatigue Deformation Mechanisms of Physically Foamed Polycarbonate
(2023)
In this study, the tension–tension fatigue behavior of foam injection molded thermoplastic microcellular Polycarbonate (PC) is characterized. The variation in morphology is obtained by modifying the mold temperature, injection volume, injection flow rate, and blowing agent content (physical and chemical) in the polymer melt. The relationship between the wide range of morphological qualities and relevant fatigue properties is made explicit via a statistical correlation coefficient analyses. The analysis is made between ...