Method and Mold for Producing Sealing Plates by Injection Molding and Sealing Plates Produced Accordingly

A mold for production of sealing plates (1) which consist of a plurality of sealing rings (3) connected by radial webs (2), made of fiber-reinforced plastic by injection molding, wherein wall-type guide elements (5) are arranged obliquely to the direction of flow of the melt streams in the mold channel (6), which is thereby largely constricted in the region of weld lines (15) formed by the convergence of the fronts of the divided plastic melt streams, these guide elements being movable between an initial position, in which 1-10%, preferably 4-6%, especially 5% of the mold channel (6) is cleared on both sides and on the bottom 0-20%, preferably 5-15%, especially 10% of the mold channel is cleared at the bottom, and a retraction position in which the end face of the guide element facing the bottom of the mold channel forms a seal with the surrounding mold channel wall or is elevated slightly above it, preferably amounting to 1-10% of the thickness of the sealing plate (1).