Apparatus for manufacturing reinforced plastic containers by blo

Details Apparatus for manufacturing reinforced plastic containers by blo Apparatus for manufacturing reinforced plastic containers by blo

1974-05-20

1976-06-01

Shore, Ronald J.

Plastic article or earthenware shaping or treating: apparatus

Preform assembly means and means for bonding of plural...

Reshaping means utilizing fluid pressure directly contacting...

425DIG214, B29D 302, B29C 1707

Patent

active

039604748

ABSTRACT:
A cylindrical, synthetic plastic container having reinforcing hoops permanently bonded around the ends of the container is manufactured in a single blow molding process. Half of the outer peripheral edge portion of each of two reinforcing hoops is positioned in a semi-cylindrical mold half to place the hoops in spaced, parallel, co-axial alignment. Thereafter, a tube of soft thermoplastic is extruded through the open central portions of the hoops until the end of the tube overlies a co-axially positioned pneumatic nozzle. The semi-cylindrical mold half with the hoops retained therein is moved into engagement with a mating, semi-cylindrical mold half to form a cylindrical mold. End plates are moved into engagement with the hoops from opposite ends of the cylindrical mold; and air under pressure is admitted through the nozzlel to blow the walls of the tube of soft thermoplastic against the interior walls of the mold, the end plates and exposed circumferential portions of the reinforcing hoops to form a homogeneous bond with the hoops.

REFERENCES:
patent: 3097058 (1963-07-01), Branscum et al.
patent: 3275726 (1966-09-01), Rudolph
patent: 3479421 (1969-11-01), Armbruster et al.
patent: 3575949 (1971-04-01), Humphrey
patent: 3861851 (1975-01-01), Schiemann

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