| 摘要 |
A method for manufacturing an engine intake manifold assembly is provided. The method includes forming a top, middle, and bottom section of the manifold assembly in an injection molding process, each including cavities defined with positive draft angles, the cavities defining a plurality of internal passageways in an assembled state of the manifold assembly. The top, middle, and bottom sections are joined to form the manifold assembly through vibration welding or ultrasonic welding. An engine intake manifold assembly having top, middle, and bottom sections joined through vibration welding or ultrasonic welding is also provided.
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