| 摘要 |
1,251,124. Homogenizing apparatus. IMPERIAL CHEMICAL INDUSTRIES Ltd. 24 Dec., 1969 [10 Jan., 1969], No. 1664/69. Heading B1C. A homogenizer for a molten polymer comprises coaxial tubes 1, 13, the former at least having annular grooves as 3, 5 of which alternate ones connect to the interior of the tube 1 by bores as 9, 11. The tube 13 has external channels 15 closed by a tubular casing (not depicted) forming conduits connected to the interior of the tube 13 by bores 17 terminating opposite these annular grooves unconnected to the interior of tube 1. The tubes 1, 13 are relatively moved, e.g. rotated or reciprocated and the material is sheared by passage over the crests between the annular grooves and discharged through the interior of tube 1. Each channel 15 may terminate in a bore 17 at a different point along the apparatus (see Fig. 1, not shown), or each channel 15 may extend the whole length of the apparatus and have several bores 17. In modifications the apparatus may be fed through a distributor plate which is integral with tube 1 and has apertures registering successively with each channel 15; the channels 15 may be dispensed with if the clearance between tube 13 and the cover tube is sufficient; there may be annular grooves on the inner surface of tube 13 in addition to or replacement of those on tube 1. |
