| 摘要 |
In accordance with the present invention, there is provided a method of forming a molded plastic article having at least one molded extension extending from a second surface thereof, and a first surface that is substantially free of sink mark defects. The method involves providing a mold ( 1 ) that includes a first mold portion ( 11 ) having a recess ( 23 ) therein. At least a portion of the base ( 29 ) of the recess ( 23 ) is defined by the upper surface ( 44 ) of a part ejector ( 14 ). A first plastic material is introduced into the recess ( 23 ) so as to form a molded extension ( 47 ). After at least partial solidification of the molded extension ( 47 ), the part ejector ( 14 ) is positioned so as to push the upper surface ( 50 ) and upper portion ( 53 ) of the molded extension out of the recess ( 23 ), while a lower portion ( 56 ) of the molded extension remains within the recess. A second plastic material is introduced into the mold so as to form a molded body ( 59 ) in which the upper surface ( 50 ) and upper portion ( 53 ) of the molded extension ( 47 ) are immersed and embedded. The lower portion ( 56 ) of the molded extension extends from the second surface ( 62 ) of the molded body ( 59 ), and the first surface ( 65 ) of the molded body is substantially free of sink mark defects opposite the molded extension. The molded plastic article includes both the molded body ( 59 ) and molded extension ( 47 ). The present invention also relates to a molded plastic article.
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