在导向衬套（16），用于引导和密封的注射成型的针阀喷嘴的闭合针头的主要部分（50）和一个紧固元件（52），其中，所述主体部（50）具有用于所述封闭针的通道开口（18），所述通道开口（18 ）具有至少一个导向部分（20，22，24，26，28，30），其包括具有用于移动微小的游隙封闭针，所述通道开口（18）的至少两个放大部分（34，36，38，40，42），其 直径是在每种情况下比所述至少一个引导部（20，22，24，26，28，30），本发明提供的是，引导衬套（16）还包括固定连接到紧固元件（52），所述主要部分的更大的（50） 中，固定构件（52）和主体部分（50）的密封元件（80）之间，其特征在于被布置，其以在所述通道开口（18）中使用 阀针完全接触。

In a guide bushing (16) for guiding and sealing a closure needle of a needle valve nozzle of an injection molding with a main part (50) and a fastening element (52), wherein the main part (50) has a passage opening (18) for the closure needle, said passage opening (18 ) having at least one guide portion (20, 22, 24, 26, 28, 30) which comprises the closure needle with slight play for movement, the passage opening (18) at least two enlargement sections (34, 36, 38, 40, 42), whose diameter is in each case greater than that of the at least one guide portion (20, 22, 24, 26, 28, 30), the invention provides that the guide bushing (16) further comprises a fastening element (52) fixed attached to said main part (50) , wherein between the fixing member (52) and the main part (50) a sealing element (80) is arranged, which is used at a in the passage opening (18) abuts closure needle in full.