Method for blow-moulding

Details Method for blow-moulding Method for blow-moulding

1996-12-16

1999-08-10

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

With step of cleaning, polishing, or preconditioning...

2642098, 264540, 425532, B29C 4904

Patent

active

059354933

ABSTRACT:
In a method of blow moulding, a parison is extruded by pushing a hollow tube of hot thermoplastic material through a die gap 2 between a mandrel 3 and die 1. An exit compression ring 5 is formed on the mandrel 3 adjacent to the die exit 2. The ring acts as a flow enhancer to ensure free flow of the thermoplastic material. Outer surfaces of the die 1 and mandrel 3 may be provided with release strips 9, 10 to prevent the parison becoming stuck to the die face.

REFERENCES:
patent: 3329752 (1967-07-01), Heider et al.
patent: 3452125 (1969-06-01), Schurman et al.
patent: 3574808 (1971-04-01), Matthews et al.
patent: 4402898 (1983-09-01), Rosenbaum
patent: 4422838 (1983-12-01), Iwawaki et al.
patent: 4519976 (1985-05-01), Uhlig
patent: 5273421 (1993-12-01), Kanoh et al.

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