| 摘要 |
<p>A tip (1) of a back flow lock disposed in the mouth of a plastifying screw (3) of an injection moulding machine for plastic, which tip (1) has a securing end (2) which is screwed into the end of the plastifying screw (3). The securing end (2) of the tip (1) has a central axial bore (5) which may serve as a start point for a drill for making a bore wherein a screw extractor or the like may be applied.</p> |
