Abstract: A turbo duct is disclosed that includes a primary body having an inlet end, an outlet end, and an internal air passageway that communicates therebetween. An anti-crush ring is operably associated with at least one of the inlet and outlet ends. The inlet and outlet ends of the primary body are dimensioned to receive a cuff for connection of the turbo duct within an engine assembly. The anti-crush ring is situated on an outside surface of the turbo duct so as to form an intermediate anti-crush structure between the contact surfaces of the turbo duct and the cuff attached thereto. Also provided is a process for manufacturing the turbo duct.

Abstract: A molded thermoplastic article including a hollow body is provided, the article comprising a first layer, and a foamed second layer, the first layer and foamed second layer defining a wall structure, the foamed second layer having a lighter density relative to the first layer. In the wall structure, the ratio of the first layer to foamed second layer varies along the length of the article.

Abstract: A molded thermoplastic article including a hollow body is provided, the article comprising a first layer, and a foamed second layer, the first layer and foamed second layer defining a wall structure, the foamed second layer having a lighter density relative to the first layer. In the wall structure, the ratio of the first layer to foamed second layer varies along the length of the article.

Abstract: In general, it is difficult to mold properly sized automotive boots without flash to be removed from the top end thereof. In accordance with the present invention, such molding is achieved placing a tubular parison between a pair of mold halves, moving a blow pin assembly downwardly partly into the top end of the parison, closing the mold by moving the mold halves together, using fingers to stretch the open bottom end of the parison, moving a sizing mandrel into the bottom end of the parison, closing inserts on the bottom of the mold around the bottom end of the parison to size the latter, blowing the parison using air under pressure discharged from the blow pin, moving the blow pin assembly farther down into the parison to size and cut the top end of the parison, opening the inserts and removing the lower sizing mandrel, opening the mold, closing the stretching fingers, and removing the blow pin assembly from the boot, which is stripped from the mold.