| 摘要 |
<p>PURPOSE:To facilitate extrusion molding of a grummet using a core by forming a concave groove for recessing the under surface of a non-insert portion according to the shape of a projection of an under surface seal lip in the vicinity of the panel under surface seal lip of the under surface of the non-insert portion. CONSTITUTION:A concave groove 7 for recessing the under surface 2a of a non-insert portion 2 is formed according to the shape of a penal under surface seal lip 6 in the vicinity of the panel under surface seal lip 6 of the under surface 2a of the non-insert portion 2. A clearance 8 between the panel under surface seal lip 6 and the under surface 2a of the non-insert portion 2 is enlarged by the concave groove 7, so that a core 15 is made thicker for that to enhance the strength. Accordingly, extrusion molding for a grummet using the core 15 can be facilitated.</p> |
