I fasteners bigHead® incorporati nella resina migliorano le prestazioni e fanno risparmiare costi di produzione


I progettisti bigHead® hanno studiato una soluzione di ancoraggio ottimizzata per prodotti stampati in SMC

When a leading industrial composite products manufacturer needed to improve the functional performance of their outdoor luminaires which are used on marine platforms and oil rigs, they turned to bigHead® Bonding Fasteners for a solution and were rewarded with additional production cost savings.

A sheet moulded compound (SMC) housing forms the upper and supporting part of the IP-rated luminaire which is designed for top-access mounting. The original moulded component formed a sealed cover with two female threaded metal fastening inserts. By necessity, the inserts were fitted after the SMC moulding process, requiring a secondary operation for drilling holes and for bonding/sealing the inserts. As well as adding several minutes production time and requiring an extra person to carry out the work, the secondary operation also necessitated inspection of the sealing seat area – and significantly, the possibility of expensive product function failure in the field when, over time, the seal performance degraded and water ingress occurred.

The customer contacted bigHead® when its design engineers began to investigate a solution to the functional performance problems and were very pleased to learn that this type of challenge is exactly what the Verwood-UK based manufacturer thrives upon. The solution was of course to embed bigHeads into the SMC material during the mould process with a completely sealed one-piece upper housing guaranteeing its resilience to water ingress for the long term.

On first investigation it was clear that a standard bigHead® fastener might be difficult to directly set into the existing and costly SMC mould tool without significant tool rework. There was also a further challenge as to how the two bigHeads could be locked in position during the mould process but easily removed.

However, bigHead’s engineering team, with their knowledge of hundreds of applications gained over several decades, designed a bigHead® to provide a secure fixing point that is fully embedded within the SMC material. As part of its engineering service bigHead® also improved the production process by providing a retention tool that could be cost-effectively fitted into the existing mould tool. This retention tool precisely and securely holds the bigHeads in position during the SMC mould cycle, and allows straightforward component removal and reloading. And importantly, by removing the need for any secondary drilling and sealing operations, significant production time and cost savings were achieved.

As with many similar engineer-to engineer projects successfully carried out by bigHead®, customer and supplier worked together through a rigorous development phase – where the fastener design and the mould retention tool were optimised, and the SMC housing fully test-house and field performance tested. Like all bigHead’s produced at its Verwood-UK factory, this customised bigHead® is fully batch tested and documented as part of the manufacturer’s ISO 9001:2008 Quality Management System.


Leggi anche

Together with GKN Aerospace Deutschland GmbH, TUM – Chair of Carbon Composites, SGL Carbon, Augsburg University of Applied Sciences, and under the co-founding authority of Bavarian Ministry of Economic Affairs, Regional Development and Energy, Cevotec started a pioneering R&D project: the full automation of sandwich structure production. …

Leggi tutto…

Venerdì 8 ottobre 2021 dalle ore 9.30 alle 13.00 si terrà a Saie Bari, presso il Centro Congressi – Sala 8, un convegno in presenza dal titolo: “Le nuove normative e Linee Guida Ministeriali per i materiali compositi innovativi FRP-FRCM-CRM. Criteri di intervento per un corretto impiego nel rinforzo strutturale ed antisismico. Il SuperSismaBonus”….

Leggi tutto…

Un biopolimero ricavato dalla lavorazione delle alghe rosse permette di sfruttare materiali plastici o inerti di altro genere per realizzare una schiuma adatta all’isolamento acustico e termico delle abitazioni, evitandone la dispersione nell’ambiente marino. L’invenzione del ricercatore Marco Caniato, della Facoltà di Scienze e Tecnologie dell’Università di Bolzano, rappresenta un importante contributo alla lotta contro le microplastiche. …

Leggi tutto…

Aircraft Interiors Expo (AIX) Virtual is set to showcase the very latest in technology and design for cabin interiors, inflight entertainment, and passenger comfort online for the very first time. The virtual event, running from 14-16 September 2021, brings together industry-leading aviation decision makers and airline buyers with the world’s top suppliers from across the globe, via a purpose-built, digital portal….

Leggi tutto…

Leggerezza, versatilità, estetica: il focus si sposta sul comfort e l’auto del futuro diventa uno spazio per vivere e lavorare. Covestro vuole andare incontro a queste richieste dell’industria automobilistica con la ricerca sui materiali….

Leggi tutto…