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High-Performance Gasketing for the Automotive Industry Engine and transmission covers, electronic components, and parts such as header tanks are increasingly being integrated into plastic assemblies which need to be sealed to the core component unit. The most commonly used plastic-to-metal substrate sealing method is the pressin-place (PIP) process. This involves a solid rubber gasket or o-ring being manually applied onto the parts. However, this process involves the risk of the gasket being displaced during compression, which may lead to time-consuming rework or leakages.
temperature, pressure, and micro-movement of the joint. These gaskets are formed by applying a bead of liquid elastomer by using automated high-precision equipment. The liquid gasket is cured by ultra-violet light within seconds and becomes a solid compression gasket with no knit line. Henkel points out that this reduces the risk of rework and leakages, while improving productivity. It also lowers the overall cost by automating the gasketing process and eliminates the inventory and the complexity of the PIP solid gaskets.
The new polyacrylate gasket material with the brand name 'Loctite AA 5884' is claimed to have excellent resistance against oil and automatic transmission fluids (ATF) and does not promote oil foaming. Therefore, according to Henkel, the new product offers benefits for the fast and efficient manufacturing of compression gaskets with a sustainability edge. // For further information, please visit: www.henkel.com
With the introduction of a new polyacrylate gasketing technology, Henkel has made the direct dispensation of a liquid gasket onto the customers’ part possible. These static gasket materials are positioned between two flanges which are held together by fasteners to prevent the leakage of fluids and/or gases by closing the gaps between these surfaces. In order to maintain the sealing function and a leak-free joint for a prolonged period, the gasket must be resistant to the medium being sealed. At the same time, it has to be capable of withstanding the application
© Henkel
Direct dispensing of the gasket
The new gasketing technology from Henkel makes it possible to directly dispense a liquid gasket onto vehicle parts.
Panacol has developed a new thermally conductive adhesive that can be oven cured at temperatures as low as 80 °C. It features excellent metal adhesion and is electrically insulating. The onecomponent epoxy resin-based adhesive called 'Elecolit' is filled with aluminum oxide and, due to its flow characteristics, can be applied by dispenser, screen printing, or spatula. Because the adhesive cures at temperatures as low as 80 °C, even heat-sensitive components can be bonded together, the company says. Curing at higher temperatures shortens the curing time. Panacol points out that, after curing, the light gray adhesive insulates electrically and provides excellent heat dissipation. Due to its properties, 'Elecolit' is particularly suitable for bonding metal components and heat sinks to electronic circuit boar
