| 摘要 |
Inside a base element ( 3 ) that is designed to be attached to one of the two parts of the mold, specifically to the part in which the material inlet to the corresponding cavity ( 7 ) is situated, a cylindrical insert ( 1 ) is in turn situated, mounted with the freedom to rotate in the corresponding housing ( 2 ), which is also cylindrical, the material inlet ( 5 ) being established in the base ( 4 ) of said insert ( 1 ) next to the molding cavity ( 7 ), which leads with a curved path and a progressively decreasing section to the access ( 6 ) to the molding cavity ( 7 ), which is also situated in correspondence with said base ( 4 ). Thus, at the end of the injection stage of each piece, an angular rotation of the cylindrical insert ( 1 ) makes the edge of the material outlet ( 6 ), which takes the form of a sharp edge, cause the cut that shears the injection branch, thus achieving a perfect finish of the surface of the piece and preventing the usual formation of protuberances, draws and other irregularities that have a negative effect on the appearance and/or safety of the plastic piece.
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