Method and device for producing a plastic component with an...

Details Method and device for producing a plastic component with an... Method and device for producing a plastic component with an...

2011-03-29

2011-03-29

Huson, Monica A (Department: 1742)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

With internal application of fluid pressure

C264S237000, C264S544000, C264S328120

Reexamination Certificate

active

07914727

ABSTRACT:
For producing a plastic component (2) with an internal hollow space (3), at first plastic is injection molded into an injection mold (4) and its cavity (6) and then for displacing the plastic melt from the internal hollow space (3) to be formed, gas under pressure is injected into the still liquid plastic melt, after which for cooling the plastic, a cooling liquid is also introduced into this internal hollow space (3). So that this cooling can be performed as quickly as possibly, the gas is compressed with the help of the cooling liquid and inserted or injected into the plastic melt, so that the cooling liquid directly follows the gas, wherein it can already extend into the internal hollow space (3) before this space is completely formed by the gas, i.e., gas and cooling liquid can be present simultaneously in the internal hollow space (3) to be formed.

REFERENCES:
patent: 4129635 (1978-12-01), Yasuike et al.
patent: 5098637 (1992-03-01), Hendry
patent: 5505891 (1996-04-01), Shah
patent: 5798080 (1998-08-01), Ogura et al.
patent: 6579489 (2003-06-01), Thomas
patent: 6716387 (2004-04-01), Thomas
patent: 6896844 (2005-05-01), Thomas

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