B - Operations – Transporting – 29 – B
Patent
B - Operations, Transporting
29
B
B29B 15/10 (2006.01) B29C 44/34 (2006.01) B29C 45/17 (2006.01) B29C 47/08 (2006.01)
Patent
CA 2540461
The apparatus (1) is provided for impregnating a melt of polymer (2) with a fluid (7). The fluid can be an expanding agent or an additive. An impregnation with the expanding agent is in particular carried out for the purpose of manufacturing foamed shaped parts using an injection molding machine. An impregnating body (10) includes a melt channel (50) and a channel system (70) for fluid infeed. The fluid guided in this system is separated by the gas permeable material (5'), in particular by sintered metal from a stream of melt (2') guided in the melt channel. The impregnation body includes a plurality of melt channels which, for example, are respectively manufactured by material removal from one piece of the gas permeable material. Each melt channel has open pores between an inlet and an outlet (50a, 50b) at its inner surface which enable the impregnation. The melt channels can contain static mixers in the stream of melt to promote the distribution of the diffused fluid in the flow of melt.
Fetherstonhaugh & Co.
Sulzer Chemtech Ag
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