Improving spray transfer / Dan Cundill in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 197, N° 4515 (08/2007)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 197, N° 4515 (08/2007) . - p. 14-16 Titre : Improving spray transfer Type de document : texte imprimé Auteurs : Dan Cundill, Auteur Année de publication : 2007 Article en page(s) : p. 14-16 Langues : Anglais (eng) Catégories : Dépôt par pulvérisation Pulvérisation électrostatique Revêtements en phase aqueuse:Peinture en phase aqueuse Système de changement de couleur Système de pulvérisation (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : An engineering breakthrough eliminates common problems with spraying waterborne materials electrostatically. For many years manufacturers have tried to do three things in thei finishing operations : - Reduce VOCs by switching from solvent borne coatings to environmentally-friendly waterbore coatings - Spray electrostatically to increase transfer efficiency - Change colours fast Individually, each task could be done but to combine the benefits of all three into one solution was impossible. Due to high conductivity of waterborne coatings, manufacturers must typically decide between spraying non-electrostatically, where they lose transfer efficiency but have to deal with expensive and unreliable solutions such as isolation systems or external charging. Then came voltage block technology that provided a safe, reliable and efficient way to spray waterborne coatings electrostatically. Unfortunately, the colour change process with a voltage block system was still slow and costly. However, with recent advances in voltage block desing, you can now get all of the cost savings of spraying electrostatically and achieve fast, efficient colour changes, without replacing current equipment. Note de contenu : - WHAT IS ELECTROSTATIC COATING AND WHY IS IT SO IMPORTANT ? - SOLUTIONS TO ELECTROSTATICALLY CHARGED WATERBORNE COATING : 1. Isolation system - 2. Indirect charging - 3. Voltage block system - ADVANCES IN VOLTAGE BLOCK DESIGN En ligne : https://drive.google.com/file/d/1CGxKiTXix5LafmbC9emeI8eH9Rnd4W0T/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27306 [article]

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Process control / Dan Cundill in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 196, N° 4505 (10/2006)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 196, N° 4505 (10/2006) . - p. 39-41 Titre : Process control Type de document : texte imprimé Auteurs : Dan Cundill, Auteur Année de publication : 2006 Article en page(s) : p. 39-41 Langues : Anglais (eng) Catégories : Procédés de fabrication Revêtements poudre:Peinture poudre Index. décimale : 667.9 Revêtements et enduits Résumé : Powder coating, widely used in industry since the early seventies, is now a mature process, yet still an industry that suffers from immaturity. Initially powder coating was seen as low quality process which was only suitable for a small number of colours. The number of these colours was very limited and colour changes on the production line were infrequent. In those days so called cartridge modules were very popular because they offered 100% powder recovery. Many things have changed since then. The number of colours sprayed has increased dramatically, colour changes are frequent and film thickness needs to be monitored and controlled to keep costs low. In addition cartridge modules have often been replaced by cyclone recovery systems, which are by nature not 100% efficient. All these factors reveal that system operating efficiency has become the determining factor for investments. Nordson, a leading supplier of surface finishing aquipment, has taken the approach that the lastest generation equipment needs to move the industry forward from it current point, by achieving process control over the powder plant for the first time. Note de contenu : - Process control - Powder transport - Precision dispensing - Powder circulation - Process improvement Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27515 [article]

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