Apparatus for plastic tubing manufacture
OwnerGordon A. Comfortinventor
Life of this patent
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Abstract
The present invention is directed to the manufacture of plastic tubing exemplified by corrugated plastic tile and parts related thereto, in which molds for shaping an extrudable plastic material are caused to shuttle linearly forwardly and rearwardly with respect to an extruding source of said plastic material. Sequentially related to linear mold movement is opening and closing mold action, which is correlated to the discharge of plastic material from the extruding source thereof. Provision is also made herein during the course of linear mold movement for parking one or more predetermined molds at a location spaced from the extruding source.
Claims7
Apparatus for the manufacture of plastic tubing, comprising a supporting framework, a plurality of mold carriages mounted by said framework for linear travel therealong, a pair of mold blocks connected to each of said carriages, first actuating means for moving one of said carriages and the mold blocks thereon along a linear path to an extrusion station for the introduction of molten plastic material, second actuating means for closing and opening said mold blocks respectively prior to and after the introduction of plastic material therein, third actuating means for moving another of said carriages and open mold blocks thereon along a linear path rearwardly past a pair of closed mold blocks, and motive means in control of said first, second and third actuating means.
Apparatus for producing corrugated plastic tubing, comprising a supporting framework, an extruder associated with said framework for discharging molten plastic, mounting means connected to said framework for reversible linear travel therealong, means connected to said mounting means defining a plurality of independently operable hingedly connected mold cavities, a plurality of actuating means connected to said mounting means and to respective said mold cavity defining means for sequentially opening and closing said mold cavities and for moving said mounting means ad mold cavities connected thereto along a linear path forwardly and rearwardly with respect to said extruder, and motive means in control of said actuating means.
Dependencies are inferred from the claim text.