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公开(公告)号：DE3720975A1
公开(公告)日：1989-01-05
申请号：DE3720975
申请日：1987-06-25
Applicant: BASF AG
Inventor： WEBER WERNER DR , ZETTLER HANS DIETER
Abstract: To mix a gas with a liquid, in particular with a reaction component for the production of foams based on polyurethane, an eddying motion is generated in the liquid by the rotary motion of a central stirring tool (2) guided into the vessel (1) from the top and gas situated on the surface of the liquid is introduced into the liquid. The liquid-gas mixture is exposed to local pressure variations by means of a dispersion element (3) which is eccentrically arranged in relation to the vessel axis and rotates at a frequency of 1000 to 7000 min to the power -1. In this manner, a particularly homogeneous liquid-gas mixture can be produced with high gas contents.
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公开(公告)号：DE3830209A1
公开(公告)日：1990-03-15
申请号：DE3830209
申请日：1988-09-06
Applicant: BASF AG
Inventor： WEBER WERNER DR
Abstract: For measuring the gas concentration of a liquid plastic component for the production of polyurethane foam materials, a sample is extracted from the main quantity of the plastic component and led into a piston-cylinder unit (4). The sample pressure is subsequently measured and the volume of the probe is changed from a first volume to a larger second volume. For this purpose, the piston (8) of the piston-cylinder unit is moved hydraulically from a first position into a second position. During and/or after the expansion of the sample, it is exposed to a shear field of 0.5 to 1000 sec with the aid of a stirring element (12) projecting into the cylinder (5). By means of the shearing of the sample, the desorption of the gas dissolved in the component is started or accelerated, so that the subsequent pressure measurement also takes into account the proportion of gas dissolved in the component. From the difference value of the pressure measurement, the actual gas concentration of the component may be determined.
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公开(公告)号：DE4032661A1
公开(公告)日：1992-04-16
申请号：DE4032661
申请日：1990-10-15
Applicant: BASF AG
Inventor： WEBER WERNER DR
Abstract: The flowmeter (1) is associated with an electronic convertor (2) feeding data into a computer (3) which digitises the measured actual values and compares successive measurements or gps. of measurements. When a predetermined range of variation is exceeded within a time limit, a pulse is produced which alters the rotational speed of the pump (4). The desired rate is restored by means of a series constriction (5) or a parallel pump vol. adjustor. ADVANTAGE - Safe and automatic control and monitoring of the mass flow are achieved esp. in mfr. of multicomponent plastics such as polyurethane.
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Patent Agency Ranking
公开(公告)号：DE3380874D1
公开(公告)日：1989-12-28
申请号：DE3380874
申请日：1983-03-16
Applicant: BASF AG
Inventor： THIELE HEINO DR , WEBER WERNER DR , ZETTLER HANS DIETER , SCHLUETER KLAUS , WALLNER JOSEF , SEID BERNHARD
IPC: B29C65/00 , B01F11/00 , B01F15/00 , B29B7/00 , B29B7/08 , B29B7/22 , B29B7/28 , B29B7/34 , B29B7/74 , B29B7/76 , B29B9/00 , B29C53/00 , B29C65/48 , B29C65/70
Abstract: A mixing head for multicomponent plastics, especially polyurethane, in whose mixing chamber (2) a hollow piston (7) can be moved to and fro to control the component streams. The hollow piston contains an expulsion piston (8), which is movable independently of the hollow piston, and which can be passed through an outlet tube (3) which adjoins the outlet orifice (4). The end face (12) of the hollow piston forms, together with the mixing chamber wall (11) nearest the sprue, a shearing gap in which the components are mixed. As a result of the design and arrangement of the pistons (7) and (8), good mixing is achievable even under critical conditions, and the mixing chamber is also easily cleaned.
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公开(公告)号：DE3920422A1
公开(公告)日：1991-01-03
申请号：DE3920422
申请日：1989-06-22
Applicant: BASF AG
Inventor： WEBER WERNER DR , ZETTLER HANS DIETER , EHRMANN GERD DR
IPC: B29B7/48
Abstract: Apparatus for mixing synthetic resin reagents has a mixing chamber with inlets for the reagents and an outlet for the mixture produced, and a stirrer in the chamber which has a tapered screw and forms a variable shear gap to the wall of the chamber. This stirrer consists of two meshing screws which revolve in the same or opposite directions and which can be moved together longitudinally. ADVANTAGE - The mixer is efficient even under critical conditions. It is self-cleaning when used for prolonged periods.
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公开(公告)号：DE3607947A1
公开(公告)日：1986-10-02
申请号：DE3607947
申请日：1986-03-11
Applicant: BASF AG
Inventor： WEBER WERNER DR
Abstract: Venting device of a metering unit (3) as a component of a circulation system for producing a reaction mixture from at least two liquid plastic components reacting together, the circulation system comprising storage vessels (1) for each component, metering units (3) for metering each component, mixing head (2) for mixing the components and feed and return lines (4, 5) to the mixing head and to the storage vessels, respectively, a vent line (8) being connected to the metering unit (3) on its suction side, which vent line is connected to the return line via a first non-return valve (9), an apparatus (10) operated at intervals and a second non-return valve (11).
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公开(公告)号：DE3416442A1
公开(公告)日：1984-11-08
申请号：DE3416442
申请日：1984-05-04
Applicant: BASF AG
Inventor： THIELE HEINO DR , WEBER WERNER DR , TAUBENMANN PETER
Abstract: For the production of a foam-forming reactive mixture, at least one of the components disposed in separate supply tanks (1) with a stirrer (6) is charged with gas before mixing with the other component takes place. To this end the component is circulated in a separate circuit by means of a conveying unit (10), the gas is supplied in the suction region and/or compression region of the conveyor unit and the gas-component mixture is compressed. Directly following the compression zone (12) the gas-component mixture is depressurised again by means of a throttle element (11), by which means high proportions of gas can be homogeneously distributed in the liquid component.
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公开(公告)号：DE3341308A1
公开(公告)日：1984-05-17
申请号：DE3341308
申请日：1983-11-15
Applicant: BASF AG
Inventor： THIELE HEINE DR , WEBER WERNER DR , SCHLUETER KLAUS , TAUBENMANN PETER , WALLNER JOSEF , SIED BERNHARD , ZETTLER HANS DIETER
Abstract: The post-mixer for split casting moulds (1, 2) for the processing by shaping of multi-component plastics has a channel system disposed in the parting plane and exhibiting mould throttle points. The channel system consists essentially of a main feed channel (4), which after a first throttle point (5) is branched into at least two side channels (6) and (7). For a smooth entry of the plastics component composition into the mould cavity of the casting mould as well as for a uniformly good mixing intensity throughout the entire injection cycle, the side channels have several throttle points (9, 10, 11) and (12, 13, 14), a change of direction of the side channels taking place between each two throttle points. The side channels open into a further chamber (19) connecting with a feed channel (20) leading to the mould cavity (21).
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