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The automobile manufacturing industry places high demands on suppliers with regard to process reliability, quality and efficiency. To meet these challenges, a preeflow customer had to optimise his application of a two-part sealant to make a form-in-place (FIP) gasket. In his previous process, the dispensed sealant bead exceeded the tolerance limits at the point where the gasket loop completed and the sealant overlapped itself. In addition, a key process variable – the material dispense pressure – could not be monitored during application. The result was a high reject rate, and poor productivity due to process variability and the resultant need for heightened and laborious QA inspection.

The preeflow team helped the customer to significantly improve the production process through implementation of more accurate dispensing technology. For process reliability, a two-part dispensing system from preeflow® is now used. The eco-DUO600 is a volumetric metering, mixing and dispensing unit which uses a progressive cavity pump principle to deliver precise amounts of the mixed sealant. The preeflow systems have precision control of the material output (which can be dynamically changed); this means that the FIP gasket application is very consistent along its entire dispensed path, including at the problematic area of the join.

The EC200-DUO controller includes material pressure monitoring and control. The preeflow eco-DUO system can be connected to the preeflow flowscreen monitoring unit, a device for showing the material process pressures on a graphic display.

Stable process for mass production is very important. With the help of the eco-DUO pressure sensors in combination with the flowscreen, the dispensing parameters can be displayed graphically in real time. Pressure fluctuations that can occur, for example, due to a blocked or defective dispensing needle, contamination, or cured material, are displayed in real time. This means that errors can be rectified immediately and the number of rejects can be minimised.

Peter Swanson, Managing Director of preeflow’s UK distributor, Intertronics, said: “Accuracy and repeatability are key concerns of our customers, and we frequently recommend preeflow dispensing systems in these types of scenarios. Whether our customers are dispensing a single-part or a two-part material, we have found preeflow systems provide a very high level of reliability combined with ease of use and real-time monitoring.” The preeflow eco-DUO system, which operates using the endless piston principle, along with the flowscreen pressure monitor, provide a repeatable and stable dispensing process. The system combines the benefits of reduced material costs with improved product quality.

For further information please see www.intertronics.co.uk/case-studies/ or visit the Intertronics blog at www.intertronics.co.uk/blog.

Intertronics

INTERTRONICS supplies a comprehensive range of bonding and protective materials – together with the associated consumables and equipment – to customers in high technology, high performance assembly industries – including electronics, medical device, plastics, optical, automotive, energy, defence and aerospace.

INTERTRONICS supplies a comprehensive range of bonding and protective materials – together with the associated consumables and equipment – to customers in high technology, high performance assembly industries – including electronics, medical device, plastics, optical, automotive, energy, defence and aerospace. The company supplies over 3,000 regular customers, including multinational manufacturing giants, production facilities, specialist design and development businesses, universities, training organisations and government establishments.

adhere is INTERTRONICS’ brand which encompasses its bonding, coating, sealing, encapsulating, potting, masking and gasketing materials, together with the most appropriate equipment and accessories for dispensing and curing them.

Because adhere brings together this proven range of integrated products from selected and trusted partners, INTERTRONICS’ customers have the confidence that everything will work together efficiently and cost-effectively, underpinned by the company’s experience and expert advice.

This advice is an essential element of the programme, and it ensures that customers benefit from the optimal material and process choice for the manufacture, assembly or repair of their products … safeguarding and enhancing performance and integrity and in turn, profitability and reputation.

Also key to customer success and satisfaction are the provision of process implementation and training, ongoing expert technical support and the assurance of highly competent supply chain management.

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