Apparatus for the manufacture of a cup-like article from...

Details Apparatus for the manufacture of a cup-like article from... Apparatus for the manufacture of a cup-like article from...

B - Operations, Transporting

29

D

18/1051

B29D 22/00 (2006.01) B29C 51/00 (2006.01) B29C 51/04 (2006.01) B65D 1/26 (2006.01)

Patent

CA 1273175

ABSTRACT OF THE DISCLOSURE The apparatus comprises a clamp for clamping a flat blank of amorphous thermoplastic material in a peripheral region thereof to form an inner zone completely surrounded by an outer clamped zone. A press engages the inner zone of the blank in a central region thereof smaller than the total area of the inner zone to form a band-like zone between the outer clamped zone and the central region in contact with the press. The press and the clamp should displace relative to one another and the material of the blank should be kept at a predetermined temperature, to produce free stretching by drawing of the blank in a drawing region between the outer surface of the press and the inner surface of the clamp without contact of the drawn material with the surfaces of the clamp and the formation in the drawing region of the material of a transition zone at which flow takes place in the material reducing the original thickness of the blank by a factor sufficient to effect crystallization of the material and substantially monoaxial orientation. This produces a drawn element which comprises an edge part composed of the clamped zone and a body which is drawn relative to the edge part and includes the monoaxially oriented crystallized material.

560155

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