| 摘要 |
The invention relates to a particleboard screw containing multiple scraping ribs, which are evenly distributed along the circumference and which are formed in a uniform manner, in the cylindrical screw shaft region that directly adjoins the screw tip. Said ribs extend in the longitudinal direction of the screw over at least one, preferably two turns. The ribs have a symmetrical triangular shape in the cross-section, wherein the tip is flattened and thus runs parallel to the surface of the screw shaft. The two flanks of the scraping ribs enclose a right angle with each other. |
