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    • 8. 发明专利
    • NO955268D0
    • 1995-12-22
    • NO955268
    • 1995-12-22
    • HENNECKE GMBH MASCHFBAYER AG
    • SULZBACH HANS-MICHAELALTHAUSEN FERDINANDSTEILEN HERBERTRAFFEL REINEREIBEN ROBERTEBELING WILFRIED
    • B29C44/00C08J9/12B29C44/34B29C44/46B29K75/00B29C
    • Producing foam from a liq. contg. gas dissolved under pressure, by expanding the liq. to a pressure below the satn. pressure of the gas and releasing the gas. The process comprises forcing the liq. through an extended flow channel so that the pressure is reduced against the flow resistance and a high shear rate is generated, and then reducing the rate of flow to 1/10-1/500 of its original value before the liq. foams. Also claimed is an appts. for this process, comprising a housing (2) contg. a long flow channel (4) with a small cross-section in at least one dimension, a distribution chamber (5) for the pressurised liq. over the opening(s) of the flow channel, a feed pipe (7) for the distribution channel (5) and a means (6) of reducing the speed of the liq. after the outlet end (15) of the flow channel (4). Pref. used esp. for the prodn. of foam from 2-component reactive plastics with CO2 as blowing agent, the process comprises mixing at least one of the components with CO2 under pressure, mixing the components, expending the CO2-contg. mixt. and hardening the foam obtd.. The liq. or reactive mixt. passes through the flow channel in less than 10 2 secs., and the shear rate produced in the channel is at least 10 4/sec.. The flow channel is in the form of a conical ring channel with an inner cone which can be moved axially to narrow the channel. The ratio between the length of the flow channel in the direction of flow and its small cross-sectional dimension is 30-300.
    • 10. 发明专利
    • A MACHINE FOR PRODUCTING MOULDINGS FROM CHEMICAL COMPONENTS
    • AU6177273A
    • 1975-04-24
    • AU6177273
    • 1973-10-24
    • BAYER AGHENNECKE GMBH MASCHF
    • SCHNEIDER WALTERBODEN HEINRICHKLIER LOTHARRAFFEL REINERALTHAUSEN FERDINANDERSFELD HEINZ
    • B29B7/00B29C33/00B29C39/00B29C39/24B29C39/26B29C44/34B29C67/24B29D27/00
    • 1423582 Mixing in conduits BAYER AG and MASCHINENFABRIK HENNECKE GmbH 19 Oct 1973 [25 Oct 1972] 48828/73 Heading B1C [Also in Division B5] Moulding apparatus comprises means for introducing reaction components into a mixing chamber 9 (Fig. 1) and a remixing system 13 for homogenising the reaction mixture comprising an arrangement of channels provided with branches 16 and junctions 17, 18 arranged between the mixing chamber 9 and a mould cavity 19, the dividing plane of the mould extending through the mixing chamber 9 and the remixing system 13. The reaction components are supplied from storage containers 1, 2 through injection nozzles 7, 8 by pumps 5, 6. As shown the remixing system &c is formed in one part of the mould, the other part comprising a plane surfaced cover. Alternatively the system may be formed in both parts of the mould. In Fig. 3 (not shown) the remixing system comprises a series of barriers 33 formed in a sprue section 30. Fig. 4 shows a further embodiment comprising two mould parts 37, 38 hinged at 39. The remixing system 46 comprises two sections 50, 51 in the form of replaceable inserts 58, 59. In the section 50, an outlet 45 from a mixing chamber 44 opens into a distributing channel 52 connected by mixing channels 53 to a collecting channel 54. The section 51 comprises a distributing channel 52 connected by mixing channels 56 to a collecting channel 57. When the mould is closed the channels 53, 56 cross over one another. Channels 56 increase in cross section in the direction of flow while channels 53 decrease. In another embodiment the mixing channels have the same cross-sectional area but differ in depth and width over their length.