|Date||08 / 2008|
Raggiunto nuovamente l’impossibile:
Il controllo delle nervature dei profili dall’alluminio
Per una corretta estrusione dei profili d’alluminio, affinché possano essere stabilizzati durante tutto il processo, a partire da una determinata larghezza delle superfici piane a vista è indispensabile inserire dei rinforzi perpendicolari. Se pur indispensabili per la buona riuscita del processo, questi (a volte) possono provocare dei ritiri o “rusucchi” del lato in vista che intersecano, dando origine a dei difetti estetici (nervature o passaggi di zona) visibili purtroppo solo dopo il trattamento superficiale di verniciatura a causa della superficie opaca dell’estruso grezzo e quindi non riconoscibili ad occhio nudo.
A ciò si aggiunge che a seconda dell’angolazione della fonte di luce, possono essere più o meno visibili, il che implica un giudizio estremamente soggettivo da parte dell’osservatore, avendo di conseguenza delle opinioni inevitabilmente differenti tra un osservatore e l’altro. Senza contare che dopo che queste vengono rilevate, è troppo tardi per scartarle perché ormai i costi di trasformazione (verniciatura o ossidazione lucida) sono stati già sostenuti costringendo il trasformatore o a mettere in commercio un prodotto qualitativamente scadente o addirittura a buttare del materiale notevolmente costoso.
Per risolvere questo problema, è ora disponibile sul mercato internazionale la Promex Objective, un innovativo sistema, deato e sviluppato da Ascona in collaborazione con l’Istituto Fraunhofer di Magdeburg in Germania e la Ponzio Sud Italia, che è in grado di assicurare in 1 o 2 secondi al massimo il controllo qualitativo delle superfici in vista dell’estruso grezzo, rilevando le “nervature, risucchi o passaggi di zona” direttamente in estrusione, valutando le eventuali deformazioni in maniera oggettiva e senza preoccuparsi dell’angolatura della luce presente, classificandole allo stesso tempo sulla base di una scala di 10 livelli appositamente studiata e presente al suo interno.
In tal modo si ottiene una gradazione qualitativa univoca che rispecchia oggettivamente il difetto del vostro profilo grezzo senza aspettare che il trasformatore se ne accorga dopo che questo viene trattato, evitando così dei costi inutili di trasformazione.
Il funzionamento del sistema è semplice, basta appoggiare la superficie della campionatura da classificare rivolta verso il sensore di misura; trattandosi di un puro controllo per riflessione, il campione non deve subire un trattamento particolare.
Promex Objective può essere utilizzato anche come terminale autonomo. Una perfetta combinazione è rappresentata, tuttavia, dalla sua integrazione con il sistema Promex Expert.
Entrambi i sistemi lavorano con lo stesso software Promex Control e sono completamente compatibili, il che consente di integrare il risultato della classificazione con il certificato del controllo dimensionale.Clicca qui per scaricare il documento pdf
|Date||07 / 2008|
Standard application ASCONA measuring system PROMEX
Greiner Extrusion making its mark in profiles
Extrusion technology is a rather complicated business. It’s the details that are most important to get optimum results in the end. Greiner Extrusion is a specialist in the construction and production of extrusiondies for the plastic profile production. Greiner Extrusion supplies its product range to profile manufacturers all over the world. Great emphasis is put on precision when these tools are manufactured. A measuring system made by ASCONA in Meckenbeuren/Bodensee is a means to this end. With PROMEX – the name of the system – Greiner sets new standards in the business.
Greiner Extrusion’s activities are exclusively focused on plastic profiles which is the champions league in this field. The company offers complete packages which are customized according to requirements and delivered as turnkey projects.
Tools made by Greiner Extrusion get profiles into shape. Usually, several tool sets are produced for each extrusion line. Extreme precision is required. A question of hundredths of millimeters.
„Tremendous efforts were needed but now that we use ASCONA technology, we have been able to reduce a lot of our expenditure“, says Robert Forstner (project management). According to him, Greiner Extrusion makes several test runs with each extrusion die. The company has got a number of extrusion lines which are used exclusively for test purposes. The dies are exchanged at the extruder and on the line after which a re-start is effected and the line operators produce plastic profiles with the extrusion dies in their different stages of manufacture. The profiles are then checked and manually measured by engineers. This is the moment where the measuring system PROMEX comes into the picture.
Any variations appearing between produced profiles and set dimensions were in the past evaluated with two projectors. Profile samples were placed on a light source to get an enlarged picture on a projection field. Technical drawings on parchment paper were then placed on top of this picture for comparison. If there were variations between the drawings and the picture, they were measured by hand and photographed. The big disadvantage with this method: an electronic evaluation or a resulting optimisation of the production process are not possible as these image files cannot be vectorised. Another handicap is the time needed: Measurement of each profile takes approx. 1 hour. Waiting time has to be added because the number of projectors is limited.
Times of this complicated and time-consuming procedure are now over. Instead of the projectors, PROMEX now supplies exact production results. Profile recognition of this measuring system is effected by a scanner which takes only seconds. Data is centrally stored and can be called in or edited by the 8 engineers which work in this department. „The automatic profile recognition software of PROMEX Control independently allocates set measuring values and required measuring commands to each profile, describes Robert Forstner (project management) this core feature. „This guarantees a fast and safe quality check.“ PROMEX Control software indicates variations from set values and displays them in different colours. Extrusion dies are revised step by step, then tested and re-measured until they conform precisely to the set dimensions.
But it is not the real saving in expenditure alone that is in Greiner Extrusion’s opinion the strong point of this technical innovation. Another very positive aspect is the data exchange with the customer. The integrated export function permits the direct data transfer to the customer to keep him informed any time on the actual stage of his project. The customer can thus supervise the profile’s quality. And Greiner Extrusion can in turn provide evidence on the precision of their work. PROMEX further offers more safety in production and planning to the customer as existing Greiner extrusion dies can be checked on their conditions with this measuring system. A profile scan sent by e-mail is enough to accomplish the task. Upon evaluation by PROMEX, information is gained for how long an extrusion die can presumably be used, when it should be sent in for refurbishment and whether a precise flaw analysis is recommendable. Greiner Extrusion is thus able to provide a better, faster and more efficient service. Expensive intervention by service engineers is avoided. Which pleases customers very much.
In total, Greiner Extrusion has had a very good experience with this system. There is no doubt that the system is very suitable for practical use. Even re-treat of the extrusion dies could be optimized through PROMEX. Therefore it was decided to simply offer the measuring system to customers in plant engineering as well. Greiner Extrusion thus adopts the role of an intermediate seller for ASCONA technology. „Greiner Extrusion is the worldwide synonym for the best solution in profile extrusion“, this is the vision of the company, which is now additionally underlined by this innovative measuring system.
Download here the PDF-file of the press release
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|Date||01 / 2008|
Sistema di controllo delle nervature
Per una corretta estrusione dei profili d’alluminio
|Datum||08 / 2006|
|Mandant|| iNOEX & ASCONA
A high-profile position for the future
iNOEX and ASCONA enter into a strategic partnership for development and sales. Aluminium producers and manufacturers of plastic profiles will in the future be able to benefit from an optimum package for quality assurance through optical measurement technology.
The two companies have started their co-operation in view of merging their product ranges for aluminium and plastic profiles and to be able to better respond to the demands arising in these markets. "As a first step we want to build a modular product design. This will make profile manufacturers profit from interesting starter solutions and the option to adapt rising quality demands to the standards of their systems.", says Reinhard Klose, CEO and partner of iNOEX GmbH. Albert Schweser, managing director of ASCONA GmbH, adds: "In October, we will show the results of this co-operation on a profile symposium where manufacturers of aluminium and plastic profiles will be presented the new PROMEX programme."
The long-standing experience in offering technology for quality assurance which iNOEX has gained mainly in the plastic profile market and ASCONA mainly in aluminium profiles, made both companies realise that the two production processes offer some more potential for increasing efficiency. With iNOEX being a 50 % partner in ASCONA now, synergetic effects can be fully used for research and development and the creation and realisation of new ideas.
Applications for profiles made of aluminium and plastic material may differ widely, but product quality is always clearly defined. Conformity to set dimensions and surface quality determine whether the buyer is satisfied or not and this will in the end have an influence on the producer’s own competitiveness.
Optical profile measuring systems offer an important support to competitiveness. Rapidly gained precise measuring results collected during production permit early corrective interventions. Manufacturers achieve cost reduction through reduced scrap rates and low complaints cost. The overall productiveness will go up.
|Datum||04 / 2006|
|Datum||11 / 2005|
|Datum||09 / 2005|
|Datum||09 / 2005|
|Datum||05 / 2005|
|Datum||02 / 2005|
|Datum|| Sommer 2004