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09-15-2015

First Top Mount with PU Bearing and PA Housing

The globally available top mount is 25 % lighter than the aluminum die-cast version with rubber (figure: BASF)

By combining its plastic specialties Cellasto and Ultramid BASF SE, Ludwigshafen, Germany, succeeded in developing a top mount that is 25% lighter than the aluminum die-cast with rubber.

The top mount links the shock absorber to the chassis and thus has a decisive influence on driving comfort and dynamics. The interplay between the materials of the individual components is therefore of crucial importance: Cellasto shows very good static and dynamic behavior, has a long life usage and takes up only a small amount of installation space. Components made of Cellasto have been used in cars for more than 50 years. The PA66 grade Ultramid A3WG10 CR is reinforced with 50 % glass fibers and is therefore exceptionally rigid and solid, even at high temperatures. The engineering plastic is particularly suitable for dynamic loads and thus generally a good alternative to metal.

The top mount with the Cellasto element and the Ultramid® housing is around 25 % lighter than conventional aluminum die-cast versions with rubber. It was developed and optimized for serial production using BASF's simulation tool Ultrasim. Combined to form the top mount, the actual bearing, the jounce bumper and the dust tube for the shock absorber can be functionally integrated and achieve good damping and acoustics. With a manufacturing technique especially developed by BASF, housing and bearing are joined to each other permanently. The CAE tool Ultrasim was used to calculate the load situations relevant for top mounts, the lifespan and the injection-molding process, taking into account the reaction forces of the Cellasto core.

"By joining Cellasto with an Ultramid housing in a top mount for the first time, we are combining our Verbund expertise in the best materials, customized design and meticulous quality management to provide our customers with rapid component development and implementation, shorter process chains and global use," says Wolfgang Micklitz, head of the global business management Cellasto. "This new and complex component offers a sustainable innovation that contributes to further CO2 savings along with high safety and maximum comfort."

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Company profile

BASF SE

Carl-Bosch-Str. 38
DE 67056 Ludwigshafen
Tel.: 0621 60-0
Fax: 0621 60-42525

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