Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Punching article from sheet material
Patent
1992-07-17
1993-02-23
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Punching article from sheet material
264511, 264550, 264554, 264163, 264255, 264265, 264268, 264292, 264296, 2643281, 264DIG50, 425111, 425553, 425398, 425292, 220415, B29C 3314, B29C 4514, B29C 4516
Patent
active
051887878
ABSTRACT:
This invention relates to an injection moulding process for the manufacture of multi-layered articles, especially articles having barrier properties. The process includes clamping a thermoplastic film over the cavity of a mould of an injection moulding process, the film being capable of being stretched. The film is then stretched within the mould by inserting the core of the mould, preferably using a core in which a central part enters the mould and partially stretches the film prior to the remainder of the core entering the mould. The mould is then closed, excess film is trimmed off and polymer is injected into the mould cavity. The resultant article is a multi-layered injection moulded article which, depending on the characteristics of the film and injected polymer, may have barrier properties to oxygen, liquids or the like that are superior to articles moulded from only the polymer. The process is particularly useful in the moulding of containers having a depth:width ratio of at least 0.5.
REFERENCES:
patent: 3321562 (1967-05-01), Wanderer
patent: 3825166 (1974-07-01), Padovani
patent: 3839129 (1974-10-01), Neumann
patent: 3857754 (1974-12-01), Hirata et al.
patent: 3975463 (1976-08-01), Hirata et al.
patent: 4104349 (1978-08-01), Hillgenberg
patent: 4239727 (1980-12-01), Myers et al.
patent: 4410482 (1983-10-01), Subramanian
patent: 4418033 (1983-11-01), Hatakeyama
patent: 4444817 (1984-04-01), Subramanian
patent: 4755129 (1988-07-01), Baker et al.
King David C.
Lillis Rupert M.
White George
Du Pont Canada Inc.
Thurlow Jeffery
Vargot Mathieu
LandOfFree
Process for the injection moulding of multi-layered articles does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the injection moulding of multi-layered articles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the injection moulding of multi-layered articles will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2202829