| 摘要 |
PURPOSE:To prevent the extrusion of calking agent between a calking pipe and a plunger when the calking agent is forced out from the calking pipe by the plunger. CONSTITUTION:A sloping receiving piece 9 with which a pressing rod 6 of an extrusion gun makes contact is provided at a connection of a tubular part 7 and a bottom part 8 of a plunger 2. When the receiving piece 9 is deformed by the pressing action of the pressing rod 6, the diameter at a location 7a of the base of the receiving piece 9 is enlarged to bring the plunger 2 into close contact with the inner peripheral surface of a calking pipe i. |
