This method combines 3-D blow molding with sequential co-extrusion, and consists of extruding two different materials (e.g., a rigid polyolefin with a soft thermoplastic vulcanizate). Coi Rubber has the perfect method to provided you with extruded products which will meet your application and demand. Using this example, the soft thermoplastic vulcanizate would be extruded, followed by the rigid polyolefin, followed again by the soft thermoplastic vulcanizate. This allows a parison with different sections of material in the extrusion direction to be produced. This process is also commonly referred to as a “hard-soft-hard” process. An inclined clamp is moved in coordinates while the parison, that has a smaller diameter than the article diameter, is placed into the mold cavity in such a way that the remaining pinch line length is reduced to a minimum. Then the mold is closed and the parison is inflated onto the cooled walls of the mold where the plastic cools down, solidifies, and sets the part shape. Finally the mold is opened and the part removed.