Method and apparatus for manufacturing multi-layer bottle

Details Method and apparatus for manufacturing multi-layer bottle Method and apparatus for manufacturing multi-layer bottle

1997-10-28

1999-11-23

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

156156, 425503, 425504, 425523, B29C 4922, B29C 4904

Patent

active

059894822

ABSTRACT:
A method and an apparatus for manufacturing a multi-layer bottle by discharging an inner layer parison from a multi-layer die head and pinching a lower portion of the inner layer parison by a pinch apparatus; discharging an outer layer parison which is longer than the inner layer parison; pinching the lower portion of the outer layer parison by a molding mold; and blow molding the inner layer parison. In such a manner, the multi-layer bottle is manufactured. When the multi-layer bottle having an inner layer separating function is manufactured, the inner layer parison and the outer layer parison comprise different resins having no adhesivity to each other.

REFERENCES:
patent: 3140004 (1964-07-01), Schaich
patent: 5447678 (1995-09-01), Kneer et al.
patent: 5454707 (1995-10-01), Mitchell et al.
patent: 5567377 (1996-10-01), Nishigami et al.

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