TECHNOLOGIE OPACIFIANTE AUX EXCIMÈRES

Alors que le marché accorde de plus en plus d'importance aux facteurs sensoriels tels que le toucher avec l'effet soft-touch ou la résistance des surfaces aux rayures et à l'usure, les fabricants de vantaux, de pièces tridimensionnelles en surface et de panneaux façonnés en général, demandent une solution qui traite efficacement tous les côtés et les bords de leur produit. Un four à excimères capable de traiter plus qu'un simple panneau plat.

Les fours à excimères classiques travaillent sur des panneaux plats à travers un processus de polymérisation à ondes courtes UV dans un milieu sans oxygène. La technologie opacifiante aux excimères donne naissance à des surfaces très performantes qui présentent un effet soft-touch. La peinture est traitée de manière à atteindre une opacité élevée, jusqu’à 5 gloss. De plus, nous obtenons l'effet que la plupart des gens recherchent, à savoir, sans traces de doigts (touch free).

Exydry-Z Elle sait tout faire et même plus. Elle traite les pièces en 3D, ce qui permet d'obtenir des façades aux bords opaques et aussi résistants que les surfaces. Développé par Cefla Finishing, ce four à excimères est une véritable innovation sans précédent. L'effet opaque, obtenu grâce au traitement qui a lieu avant la réticulation complète, atteint aisément des valeurs inférieures à 5 gloss, sur une échelle comprise entre 0 et 100. La résistance de la surface des panneaux traités et séchés dans Exydry-Z est extrêmement élevée malgré la très faible opacité.

Nous avons également mis en avant l'aspect de la durabilité. L'azote utilisé pour éliminer l'oxygène des axes X, Y et Z d'un panneau profilé est nettement inférieur à celui des fours à excimères classiques.

Bénéficiant de trois technologies en instance de brevet, ce système innovant traite, par exemple, des vantaux jusqu’à 25 mm d’épaisseur, peintes par des machines de pistolage oscillantes. La conception de ce four permet un flux continu de panneaux profilés dans le four et élimine la totalité de l'oxygène sans jamais arrêter l’installation. Les principaux avantages concernent en particulier la qualité de finition améliorée et le fait de pouvoir l'obtenir sur des objets tridimensionnels, mais également la diminution des coûts de production due à la rationalisation des consommations d'azote.

Voulez-vous en savoir plus?
TECHNOLOGIE OPACIFIANTE AUX EXCIMÈRES

Grâce à un procédé de polymérisation UV à ondes courtes dans un environnement sans oxygène, la technologie opacifiante aux excimères produit des surfaces hautement performantes.

Exydry-Z

Exydry-Z utilise la technologie aux excimères pour obtenir une surface résistante à effet soft-touch, qui évite les traces liées à des empreintes de doigts et offre une opacité élevée, même sur les panneaux profilés, mais aussi sur les bords des vantaux.

UV-R

UV-R est un four de séchage par rayonnement UV regroupant en un seul module tous les éléments du process : transport, lampes UV et armoire électrique.

Frequently Asked Questions

Which coated materials need drying?

All coated materials need drying. The type, duration and method of drying differ according to the nature and quantity of the applied lacquer.

How many and what types of drying are there?

Mainly two categories: physical and chemical drying. The former is based on hot air, air flow speed and time, while the latter requires a source (typically lamps) to activate some internal components in the lacquer. There are also lacquers that need both of these methods.

What types of oven are there?

There are different types of oven: in-line, vertical and UV. The first two will dry items through a physical process and differ by size, working speed and hold times of the workpieces. UV ovens, on the other hand, are based on a chemical process and their size is smaller. The choice of an oven is determined by the type of lacquer used.

How do I decide which drying technique is the most suitable?

The recommended type of drying depends on the type of product and is normally defined in agreement with the lacquer manufacturer, to ensure the required coating performance over time. The coating cycle, which also includes drying, is then defined with the aim of obtaining the desired final result, reducing the required investment and optimising performance.

What are the advantages of drying?

Let's talk about the advantages of the whole finishing process, which includes lacquer application and drying. The "finished" item ends up with improved resistance and protection from external agents, as well as a better aesthetic presentation.

What is meant by excimer drying?

Excimer drying is a drying process for UV coating products, which allows surfaces to be obtained with truly outstanding deep matt finish and resistance characteristics of the coating film. Normally it is a mixed cycle, which includes the evaporation of the solvents, followed by exposure to a dedicated lamp (an excimer lamp), to end with final UV crosslinking, necessary to definitively "lock in" the obtained result. The oven Exydry-Z ensures a deep matt finish, surface resistance and soft touch effect even on shaped or raised panels.

What is meant by inert atmosphere drying?

Drying in an inert atmosphere is obtained by dramatically reducing the amount of oxygen present in the oven and replacing it with an inert gas, nitrogen. Considering that oxygen is the natural barrier preventing the crosslinking process, this type of drying allows a 40-70% reduction in the quantity of photoinitiator needed to start crosslinking of UV coatings, resulting in significant cost savings. The first inert atmosphere oven on the market is UV-I.

What are the advantages of drying in an inert atmosphere?

In addition to the dramatic reduction in photoinitiator requirements, with the resulting lower cost of lacquers, drying in an inert atmosphere ensures other advantages. The lacquer used is less harmful to the environment. The yellowing effect caused by photoinitiators is less likely. Fewer UV lamps are required to activate crosslinking, resulting in lower energy costs.

How can I measure drying quality?

Different systems can be used to evaluate the drying quality and characteristics to be obtained from the finishing process. For example, if we want to test the final degree of resistance of the treated item, we will use destructive tests, or tests with solvents or with abrasive tools.

What should I expect in terms of consumption?

Mainly, consumption is in the form of electrical power, necessary to operate the fans that blow air or to handle workpieces inside the ovens, but also to power the lamps.

How simple is it to use a drying oven?

Normally drying ovens are rather simple machines, only a few parameters need adjustments and most importantly, these parameters remain stable even when the lacquer colours and/or the shapes of the coated pieces change. No particular skills are therefore required; it is necessary, however, to set the temperatures for the different zones (if any), the air speed and possibly the power of the lamps (if any).

How long does it take to clean a drying oven?

Normally drying ovens are basically maintenance-free, as these machines do not generally get very dirty.

Is a drying oven very maintenance-intensive?

It depends on the type of oven but generally speaking drying ovens are low maintenance. Only vertical ovens, due to their operating mode, require some extra care because of the loads that they have to bear, but all that's required is checking, tensioning and lubricating some of their parts.

Is there any after-sales service available near me?

Our international network of distributors and branch facilities is widespread globally, and most likely, you'll easily find the right contact in your own country. Otherwise, in just a few days we will send spare parts and technicians straight from our headquarters.

Can I easily manage process scheduling including drying?

The entire coating process, or the drying part only, can be managed through recipes, therefore in a very straightforward way.

Are the edges dried, too?

The drying process depends on the type of coating process. If the edges are treated during the work cycle, these will obviously require drying.

Can any oven be associated with any coating process?

Ovens, just like the coating application machines, have specific characteristics. This makes some ovens specifically suitable for some processes, while others are more flexible and able to adapt to different types of application. For example, a vertical oven is specifically intended for raised or shaped doors, but it can also be used for flat ones.

How flexible is the oven?

Each oven is created with a specific objective in mind. Within the scope of these specifications, it is obviously possible to adjust some parameters including temperature, air speed, power of the lamps and lamp distance. The machines are therefore inherently flexible when operating within their design scope.

Can I order spare parts easily?

 Yes. You can order spare parts by email, by phone, but also using cMaster, our dedicated App for ordering spare parts.

None

Vous êtes à la recherche de la solution idéale pour votre ligne de vernissage ? Tout ce que vous devez faire est de sélectionner le matériau à traiter, le secteur ou le produit fini. En 3 passages seulement, vous obtiendrez un choix de solutions de nos installations de vernissage sous-divisées par niveau de flexibilité, étendue de production et espace physique occupé. Vous trouverez en effet trois « tailles » d'installations de vernissage : petites (S), moyennes (M) ou grandes (L).

Configurez vos lignes

Vous pourriez aussi être intéressé...

ceflaLab

Pour nous, la recherche technologique et l’innovation continue sont incontournables pour atteindre des résultats satisfaisants. Nous voulons avant toute chose être des conseillers et des partenaires.

en savoir plus