A method for producing a hollow body by an extrusion blow molding procedure with a movable hollow cylinder

摘要

A method for producing a hollow body (8) made of thermoplastic plastic material with at least one component (5) in the interior of the hollow body (8) by an extrusion blow molding procedure, whereina) of molten plastic material (30) made of a nozzle head (20) in the form of a tube-like preform (3), andb) subsequently, the preform (3), in which the at least one component (5) is arranged in an at least two-part tool (9a, 9b) is enclosed and, with gas pressure to the tool (9a, 9b) is pressed, wherein the at least one component (5) with the plastic material (30), in particular clamped,, is characterized by the,that during step a) a hollow cylinder (4) under the nozzle head (20) is disposed, so that the molten plastic (30) on an outer surface of the hollow cylinder (4) flows downwards,and in that before step b) of the hollow cylinder (4) from the preform (3), in which the at least one component (5) already is arranged, is removed. The present invention provides a simple and cost-effective method, in the construction components, in particular also large built-in parts, in a hollow bodies produced by an extrusion blow molding procedure can be arranged, wherein an undesired, premature contact between the built-in parts and the preform during the manufacturing process is reliably prevented, in particular without that, on account of the operational sequence of the additional weld seams are formed on the hollow body.