Internal gas pressure method for producing plastic parts
OwnerAndreas Praller, Mikael Orsén +1inventors
InventorsAndreas Praller, Mikael Orsén, Marcel Op de Laak
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Abstract
A method for producing a molded part, wherein a molten polymer is introduced into a mold space of a molding tool and liquid carbon dioxide with a pressure of at least 160 bar, preferably with a pressure of at least 200 bar or at least 250 bar is supplied to the mold space, whereby the polymer is pressed against the walls of the mold space and a space is formed in the polymer.
Claims21
A method for producing a molded part, wherein a molten polymer is introduced into a mold space of a molding tool and a pressure fluid is supplied to the mold space, whereby the polymer is pressed against the walls of the mold space, characterized in that liquid carbon dioxide with a pressure of at least 150 bar is used as pressure fluid.
Dependencies are inferred from the claim text.