Mold assembly for molding frame-installed and skin-covered seat cushion structure

A mold assembly for molding a frame-installed and skin-covered seat cushion structure, which comprises:

• a mold having a cavity formed therein;
• a frame like retainer jig capable of being put on said mold having an aperture exposed to the cavity of the mold;
• clamps held by said retainer jig for clamping a frame inside said seat cushion and sandwiching peripheral portions of a skin member of the seat cushion structure which is to be produced between said retainer jig and said frame, each clamp including a bracket connected to said retainer jig, a lever pivotally connected to said bracket and having a jaw-like leading end portion which is projectable into said cavity through said aperture to clamp said frame and sandwiching said peripheral portions of the skin member between said frame and said retainer jig, and a handle fixed to a head of said lever to be manually handled;
• a lid capable of being put on said mold for closing said cavity of said mold and said aperture of said retainer jig interposed therebetween, said lid having recesses for neatly receiving therein said bracket, said handle and an upper part of said lever of said clamps when the lid is properly put on said mold;
• and
• sealing means for achieving a sealing between said mold and said lid upon proper putting of said lid on said mold.