Arrangement for the manufacture of synthetic plastic material hollow bodies

A blow mold for producing bottles or similar hollow containers from parisons of synthetic plastic material, comprising two mirror-symmetrically arranged blow mold halves movable toward and away from each other normal to a separating plane of the mold between a closed and an open position, each of the mold halves comprises an outer mold part having an inner endless face defining in the closed position of the mold halves part of a mold cavity for forming a bottle and an end face located in the closed position of the mold halves in said separating plane and abutting against a corresponding end face of the outer mold part of the other mold half;

• and an inner mold part having an outer endless face guided for independent movement relative to the respective outer mold part in said inner endless face of said outer mold part, and a concavely curved end face extending transverse to said inner endless face thereof and having an end edge spaced in the closed position of the mold halves from said separating plane.