Fügen von Kunststoffen

Menacher, Markus; Drummer, Dietmar

doi:10.1365/s35145-011-0082-2

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…As shown in , due to the rubber‐like, elastic material behavior above the crystalline melting temperature caused by radiation crosslinking, there is no squeeze flow during vibration welding anymore. Therefore, it can be expected that, while vibration welding radiation crosslinked fiber‐reinforced thermoplastics the disadvantageous fiber reorientation can be avoided and higher weld strengths can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Influence of radiation cross-linking on fiber orientation in vibration welds of Polyamide 66

2015

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A conventional vibration welding process of fiber‐reinforced Polyamide 66 is characterized by a continuous melt flow in the quasi‐steady phase. This squeeze flow leads to a disadvantageous fiber reorientation in the weld zone. The fibers are oriented parallel to the melt flow and thus perpendicular to the common stress direction. This causes relatively low weld strength compared to the strength of the base material. Radiation crosslinking fiber‐reinforced Polyamide 66 with electron beams influences the material characteristics. As a consequence, the resulting energy balance during vibration welding is changed and the squeeze flow is impeded, thus averting the fiber reorientation in the weld seam. The scope of this article is to demonstrate the influence of radiation crosslinking on fiber orientation in vibration welds. Mechanical, calorimetric, rheological, scanning electron microscope, and light microscope investigations serve to highlight the influence of radiation crosslinking on the vibration welds of fiber‐reinforced Polyamide 66. POLYM. COMPOS., 38:489–495, 2017. © 2015 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Influence of radiation cross-linking on fiber orientation in vibration welds of Polyamide 66

2015

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“…As the demands for plastic increases so do the requirements for joining. Of the many techniques that are available for joining thermoplastics, ultrasonic welding is one of the preferred processes because it is simple to automate [1,2]. It uses high frequencies (20 -40 kHz) to produce low amplitude mechanical vibrations (0.001 -0,025 mm).…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Welding of Polyamide and Polycarbonate Plates

Schaefer

2010

KEM

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Ultrasonic welding of plastic is state-of the-art technology. The thermal rise in the bonding area is produced by absorption of vibrations introduced. In the contraction area, frictional heat is produced so that material plasticizes locally, forging an insoluble connection between both parts within a very short period of time. The prerequisite is that both working pieces have a near equivalent melting point. To be able to extend the known influences and limits due to ultrasonic welding of plastic and metal parts the bonding process is of interest. In this study, the author applied the ultrasonic welding method to polyamide and polycarbonate plates and investigated the temperature distribution of the weld and the resulting flexural behaviour without the consideration of an optimum joint geometry.

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Post‐crosslinking behavior of radiation crosslinked polyamide 66 during vibration welding

Leisen

Seefried

Drummer

2016

Polymer Engineering & Sci

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Vibration welding of radiation crosslinked polyamide 66 leads to a different relationship between process, structure, and properties. The radiation‐induced altered material properties result in an impeded squeeze flow and higher temperatures in the weld. It is possible to achieve weld strengths up the value of the base material. General theories cannot completely explain the adhesion for these crosslinked polymers. A possible explanation could be an additional temperature‐dependent adhesion mechanism. The high temperatures during vibration welding could affect the degree of crosslinking and lead to a post‐irradiation crosslinking of the polyamide. These additional links across the joining zone may be an additional adhesion mechanism and could explain the high weld strength of crosslinked polymers. The scope of this paper is to investigate the influence on the degree of crosslinking from material and welding parameters and to correlate these results with temperatures and weld strengths generated in a vibration welding process. POLYM. ENG. SCI., 56:735–742, 2016. © 2016 Society of Plastics Engineers

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Fügen von Kunststoffen

Cited by 3 publications

References 4 publications

Influence of radiation cross-linking on fiber orientation in vibration welds of Polyamide 66

Influence of radiation cross-linking on fiber orientation in vibration welds of Polyamide 66

Ultrasonic Welding of Polyamide and Polycarbonate Plates

Post‐crosslinking behavior of radiation crosslinked polyamide 66 during vibration welding

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