Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – Plural wear or shaping surfaces mounted for alternative use
Patent
1980-09-12
1982-04-20
Silbaugh, Jan H.
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
Plural wear or shaping surfaces mounted for alternative use
264508, 425185, B29C 1707
Patent
active
043256856
ABSTRACT:
In an apparatus for producing thermoplastic tubing, the apparatus being of the type comprising a pair of complementary mold assemblies providing recirculating mold units which cooperate in pairs along a forward run to define a mold cavity, each mold unit comprises a transversely displaceable die member providing a plurality of half molds which can be selectively displaced to an operative position. The apparatus includes selectively operable cam means positioned along the return runs of the mold units for selectively engaging the die members. The half molds in each die member are configured differently, there being at least one with a smooth inner surface and at least one with a corrugated inner surface.
REFERENCES:
patent: 3286305 (1966-11-01), Seckel
patent: 3430292 (1969-03-01), Bauman et al.
patent: 3746487 (1973-07-01), Andrews
patent: 3881851 (1975-05-01), Allanic et al.
Lupke Gerd P. H.
Lupke Manfred A. A.
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