Accueil
Détail de l'auteur
Auteur Norbert Halmen |
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la recherche
Into the process at the speed of light / Dorothea Marquardt in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)
[article]
Titre : Into the process at the speed of light : Faster process and product control thanks to inline optical spectroscopy Type de document : texte imprimé Auteurs : Dorothea Marquardt, Auteur ; Franziska Eichhorn, Auteur ; Norbert Halmen, Auteur ; Christoph Kugler, Auteur ; Thomas Hochrein, Auteur ; Martin Bastian, Auteur Année de publication : 2018 Article en page(s) : p. 46-51 Langues : Anglais (eng) Catégories : Analyse spectrale
Colorimétrie
Ligne d'extrusion
Matières plastiques -- ExtrusionIndex. décimale : 668.4 Plastiques, vinyles Résumé : Spectroscopic instrumentation has a wide application field in plastics processing. However, users have held back from purchasing process analytics. This is despite the fact that instrumentation methods can, both in the near infrared and visible spectral ranges, be smartly and robustly integrated into the process. Note de contenu : - Inline measurement of colors in continuous processes
- Determining the residence time of materials
- Inline colorimetry in discontinuous processes
- Measurment in the near infrared range
- Chemometric and NIR-spectroscopy
- NIR/VIS-Inline analytics for compounding
- Inline formulation and viscosity sensor
- Fig. 1 : A view in the melt : colorimetry probe with spherical sapphire window and scew thread (1/2" 20 UNF) for use in extrusion lines
- Fig. 2 : Installation position of the color measurement system in the blow molding machine
- Fig. 3 : ExtruSens spectroscopy system with fiber-optic
- Fig. 4 : AddiCheck measurement system for extrusion applications
- Fig. 5 : Comparison of the measurement probes in the extrusion process in line, online, atline, offlinePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31446
in KUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 46-51[article]Réservation
Réserver ce document
[article]
Titre : Transparency in compounding : Inline testing methods for monitoring processes Type de document : texte imprimé Auteurs : Pierre Pfeffer, Auteur ; Norbert Halmen, Auteur ; Thomas Hochrein, Auteur ; Giovanni Schober, Auteur Année de publication : 2021 Article en page(s) : p. 10-13 Langues : Anglais (eng) Catégories : Analyse spectrale
Assurance qualité
Contrôle non destructif
Matières plastiques
Mesures optiques
Micro-ondes
Procédés de fabrication
Térahertz
UltrasonsIndex. décimale : 668.4 Plastiques, vinyles Résumé : The quality of final products can be increased by using measurement technology for monitoring production processes. Interest in it is increasing especially for compounding. There are various existing methods of non-destructive testing that can also be used inline in the manufacturing process. The different methods are suitable for different applications: an overview of the current capabilities and limitations of the various inline methods. Note de contenu : - Ultrasonics : Proven, but temperature-dependent technology
- Optical spectroscopy : Regulating color directly in production
- Microwave and terahertz : Temperature-independent and non-contacting
- The appropriate method for the particular application
- Fig. 1 : An overview of electromagnetic and mechanical waves arranged in the order of frequency and wave length : The red colored areas represent the NDT methods used in plastics processing
- Fig. 2 : Dependence of measurable ultrasonic amplitude (extinction coefficients) of filler content and the accompanying median size of chalk particles in plastics compounds: By using such databank-integrated calibration curves, both of these quality relevant features can be quantified inline by ultrasound
- Fig. 3 : Process chain exemplified by color measurement of dyed plastics products: Dyed compounds are manufactured from various raw materials and processed further, either continuously by extrusion, or discontinuously to injection molded products. All along the process chain there are various possibilities for monitoring color quality
- Fig. 4 : Dependence of a characteristic value, the so-called refractive index determined via terahertz from the degree of melting in a compound or the melt temperature: The degree of melting can be recorded inline by consulting a databank specific to the material
- Fig. 5 : The dependence of so-called intensity, a characteristic value recorded via terahertz from the stochastic appearance of foreign materials in a compound (left), as well as a microscopic image of a machine-related wear particle in the melt (right): A threshold value (red line, left) can be defined by taking a variety of processing states into consideration beyond which the measuring signal can be univocally consigned to a foreign particleEn ligne : https://drive.google.com/file/d/14HvEX29bLDS3vrJDpT7bgV9MOWqmqJhZ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35712
in KUNSTSTOFFE INTERNATIONAL > Vol. 111, N° 4 (2021) . - p. 10-13[article]Réservation
Réserver ce document