Blow molding machine

Abstract

To avoid any displacement of the heavy extruder with the blow head or of the heavy mold closing support with blow mold in three planes that are perpendicular to one another, which displacement has so far been necessary in the production of multiaxial hollow plastic articles, such as curved tubular pieces, the invention suggests the provision of a movable premold or intermediate mold which is matched to the shape of the mold cavity of the blow mold and includes a mold trough which is open at the blow head side, namely between the tube or blow head and the blowing station including a blow mold with a horizontal parting plane, the premold being at least displaceable in the tube receiving position below blow head in two directions (X and Y axes) which are horizontal relative to one another, and being adapted to be lifted and lowered (in the Z axis) and the bottom of said premold being movable over the cavity of a mold part for releasing the parison, e.g., in that the premold bottom consists of one or more doors.

Dependencies are inferred from the claim text.