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AssigneeWilhelm Hegler
InventorsWilhelm Hegler, Ralph-Peter Hegler
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An apparatus for the manufacture of transversely contoured tubing from thermoplastic material. The tube emerges in the plastic state from an extrusion nozzle and is guided into a mold composed of a plurality of mold sections in series, with inner side working surfaces forming the transverse contours. Each of the mold sections is composed of two mold halves which are arrayed along a straight molding run in two confronting rows and which are circulated. In the circulation, the first two mold halves are moved apart and out of the molding run at the end of the molding run and are guided to a return run on which they are separately returned to the beginning of the molding run where they are rejoined to the preceding mold half. The mold halves are guided on the return run in a continuous, accelerated and then decelerated movement by a transfer mechanism which couples and uncouples from the mold halves as actuated by pneumatic cylinders under the control of limit switches.
In an apparatus for the manufacture of tubing from a thermoplastic material comprising an extrusion nozzle which supplies a tube of thermoplastic material in a plastic state, a mold train in facing relationship to said extrusion nozzle, which mold train comprises at least two pairs of cooperating mold halves, means for moving said pair of mold halves along a straight molding run, first transfer means for separating said mold halves, return means for returning the separated mold halves along separate return runs to a position facing the nozzle and second transfer means for re-joining said separated mold halves, and wherein the improvement comprises that said first transfer means, said second transfer means and said return means are a single entity including a carriage, pivotable arm means being attached to said carriage for movably supporting a gripper for releasable attachment to one of said mold halves, there being provided means to cause the continuous motion of said gripper from one end of said molding run to the other.
Dependencies are inferred from the claim text.