Federal-Mogul Corp. Powertrain - Sealing – Southfield

Injection Molding of High Modulus Bonded Pistons Used in High Pressure Transmissions

Increasing hydraulic pressures and reduced packaging space in new generation dual clutch and automatic transmissions have triggered the need for higher tensile strength and higher modulus (stiffer) elastomer lips on bonded pistons to resist deflection and wear. But the higher viscosity of materials satisfying these requirements inhibits flow in the injection molding process.

In addition to a new material formulation Federal Mogul has developed tooling and manufacturing processes that overcome this limitation, and successfully produce pistons that enable transmission manufacturers to reach their design goals. Higher productivity, lower scrap rates, and an industry leading doubling of modulus are the result.