Patent ID: 8366435
Filing Date: 2013-02-05
Classification: B29C

Abstract:
1. An extrusion blow mold system comprising: a first mold part having a first plurality of cavity portions; a second mold part having a second plurality of cavity portions, the first mold part and second mold part interconnected to move as one piece in opposite directions in a first travel path; a third mold part having a third plurality of cavity portions; a fourth mold part having a fourth plurality of cavity portions, the third mold part and fourth mold part interconnected to move as one piece in opposite directions in a second travel path, the first, second, third and fourth mold parts together making up a first mold unit; and an operating system for the first mold unit through which: a) the first and second mold parts are moved guidingly relative to the third and fourth mold parts in the first travel path; and b) the third and fourth mold parts are moved guidingly relative to the first and second mold parts in the second travel path to thereby change the first mold unit between first and second states, the first and third mold parts meeting at a first parting line so that the cavity portions in the first plurality of cavity portions align one each with the cavity portions in the third plurality of cavity portions to define a first plurality of cavities, each to receive a parison with the first mold unit in the first state, the second and fourth mold parts meeting at a second parting line so that the cavity portions in the second plurality of cavity portions align one each with the cavity portions in the fourth plurality of cavity portions to define a second plurality of cavities, each to receive a parison, with the first mold unit in the first state, the mold parts relatively positioned through the operating system to place the first mold unit in the second state to allow molded products formed from the parisons to be released from their respective cavities, the extrusion blow mold system further comprising a force applying mechanism acting between the second and third mold parts to urge the second and third mold parts away from each other and thereby urge the second mold part against the fourth mold part and the third mold part against the first mold part with the first mold unit in the first state.