| 摘要 |
<p>The present invention provides a method for manufacturing a tubular body member for use as a clean air duct (10) including the steps of providing a blow mold (50) with at least one embedded knife (54), forming a tubular body (12) with an apex (78) where the embedded knife is located; removing the tubular body from the blow mold, and cutting the tubular body at the apex so as to form an open end (14, 16). Another method for manufacturing a clean air duct includes the steps of providing a tubular body (12) having at least one open end, inserting the open end onto a mandrel (90), closing an injection mold (110) around the tubular body and the mandrel, and injecting a polymeric material into the mold, to secure a connecting means (30) to the tubular body so as to form the air duct. The method concludes by opening the injection mold and removing the air duct from the injection mold. The invention also includes clean air ducts (10) for interconnecting an air filter to a throttle body comprising a blow molded tubular body (12) with at least one open end (14, 16), the open end having an annular ring (72) which terminates at an inwardly extending lip (86); and injection molded connecting means (30) molded around and secured to the annular ring, and the lip.</p> |
