Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Rod or tubular preform
Patent
1974-06-17
1976-01-13
Spicer, Jr., Robert L.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Rod or tubular preform
425DIG218, 264318, B29C 1700
Patent
active
039320944
ABSTRACT:
A multiple station plastic pipe belling machine in which an endless conveyor periodically receives one of a series of plastic pipes as each pipe is dumped from a V-trough receiving such pipes in sequence after their extrusion and cutting into predetermined pipe lengths, disposes the pipes so received parallel to, but spaced from, each other and advances the thus-disposed pipes in predetermined increments; positions the pipes in such a manner that their ends to be belled are first passed in such increments through a heater adjacent the edge of the endless conveyor, while the pipes are continuously rotated until each pipe passes out of the heater and is then carried in such increments by the endless conveyor into the first of a plurality of belling stations where a pair of semi-circular clamps encircle the pipe end and a mandrel or plug is inserted therein. After insertion of the plug, the clamps are removed and the thus-plugged pipe is further moved incrementally through several additional belling machine stations in a cooling area until the pipe end is sufficiently cooled, whereupon the plug is withdrawn so that the pipe may be further advanced by the endless conveyor for discharge from the machine. As soon as one pipe is moved into the cooling area from this first clamping and plugging station, the next pipe is clamped and belled in that station. The plugs project from blocks which, after first being moved into the first station transversely to the path of the pipe end carried by the endless conveyor, thereby to enable the plug to be inserted in a pipe end, are then moved along the incremental path of the pipe end to the last belling station, whereupon the block is moved back transversely from and out of said path to a point behind the other blocks so that it may be shifted back behind the other blocks to a position for removement back into the first station. All movements of the machine are synchronized through appropriate clutching, gearing, sprocket and chain devices, and this synchronism is characterized by being of predictable and repeatable time span.
REFERENCES:
patent: 2945077 (1960-07-01), Polk
patent: 3205535 (1965-08-01), Niessner et al.
patent: 3672804 (1972-06-01), Dalik
patent: 3806301 (1974-04-01), Osterhagen et al.
patent: 3812909 (1974-05-01), Rogalsky et al.
patent: 3852015 (1974-12-01), Stanbury
Bond Joseph Kim
Emery Vernon V.
Hash Robert S.
Korff Wolfram G.
Charvat R. J.
Emery Company, Inc.
Pavitt, Jr. William H.
Spicer, Jr. Robert L.
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