Manufacturing method of resin container

Details Manufacturing method of resin container Manufacturing method of resin container

2011-05-03

2011-05-03

Huson, Monica A (Department: 1742)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

C264S540000, C264S173160

Reexamination Certificate

active

07935300

ABSTRACT:
A manufacturing method of a resin container includes continuously supplying a base material resin forming a container body from a main extruder, discharging from a discharge portion provided in a die head a sub-material supplied from a sub-extruder so that the sub-material joins the base material resin, extruding a parison from a slit portion opened on an end side of the die head, and blow-molding the parison, thereby forming a coating layer which covers the whole or a part of the container body by using the sub-material. A thickness reducing portion in which a thickness is continuously reduced is formed in the coating layer while adjusting a resin pressure in a supply path of the sub-material fed from the sub-extruder by performing suck-back control which pulls back the sub-material from the discharge portion at an arbitrary timing when joining the sub-material with the base material resin.

REFERENCES:
patent: 6547995 (2003-04-01), Comb
patent: 2003/0000909 (2003-01-01), Sakaguchi et al.
patent: 2005/0287323 (2005-12-01), Akiyama et al.

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