Apparatus for molding thermoplastic pipes
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United States of America Patent
Stats
-
Jul 21, 1987
Grant Date -
N/A
app pub date -
Apr 9, 1986
filing date -
Apr 9, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for molding externally ribbed and corrugated thermoplastic pipes, including a pipe die for extruding a parison of a thermoplastic material; moldblock halves circulating in endless paths and cooperating with each other to form a travelling mold; and a means withstanding the hydraulic pressure of molding. The means is represented by yokes having shanks for engagement with complimentary recesses made in the halves. The yokes are provided with rollers guided in parallel paths ensuring that the shanks are driven toward and away from the recesses in a progressive motion without changing their orientation.
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Cited Art Landscape
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