| 摘要 |
PURPOSE:To prevent a step from being produced between a weather strip and a molded connecting part by clamping a terminal end of the weather strip between lower and upper molds, pouring a material for the connecting part into a mold cavity, and raising the upper mold during a foaming process of the poured material so as to render the terminal end substantially free. CONSTITUTION:To mold a connecting part 1B, a metallic mold having a stationary lower mold and a movable upper mold is clamped, with a weather strip 1A clamped between the lower and upper molds and fronting a mold cavity. A foamable sponge rubber material for forming the connecting part 1B is poured into the mold cavity through a gate. The rubber material is poured in an amount slightly smaller than the cavity volume, allowing for expansion due to foaming. When the rubber material is foamed to substantially fill up the cavity, excess portion of the rubber material is fed back through the gate. From this time on, the pressure exerted on an end face of the weather strip by the poured material is lowered. When the feeding back is started, the upper mold 3 is raised within a range C' corresponding to a clamping allowance C, and this condition is maintained until the molding operation is completed. |
