Abstract:
Mischelemente mit verringerter Bautiefe für statische Mischer, statische Mischer umfassend mindestens zwei Mischelemente mit verringerter Bautiefe, sowie ein Verfahren zum Mischen von Fluiden mittels eines Mischelements mit verringerter Bautiefe oder eines statischen Mischers umfassend mindestens zwei Mischelemente mit verringerter Bautiefe. Bei den Mischelementen ist die Dicke der Querstrebe an ihrer dicksten Stelle maximal 0,9 bis 1,1 mal der Dicke der Stege multipliziert mit dem Cosinus des halben Öffnungswinkels O dividiert durch den Sinus des vollen Öffnungswinkels O.
Abstract:
An improved a device and method for dispersion and simultaneous orientation of nanoparticles within a matrix is provided. A mixer having a shaft and a stator is provided. The shaft may have a rupture region and erosion region. Further, an orienter having an angled stationary plate and a moving plate are provided. The nanoparticles and the matrix are fed into the mixer. A rotational force is applied to the shaft to produce shearing forces. The shearing forces disperse and exfoliate the nanoparticles within the matrix. The dispersed mixture is outputted onto the moving plate. The moving plate is forced across the angled stationary plate to produce fully developed laminar shear flow. The fully developed laminar shear flow or the two-dimensional extensional drag flow orients the dispersed nanoparticles-matrix mixture.
Abstract:
The invention is a weighing and mixing system for the preparation of mixtures of components required by processing machines for the manufacture of plastic products. In particular the invention is suitable for the preparation of weighed mixtures comprised of at least two different masterbatches in order to obtain the color shade desired for a specific plastic product.
Abstract:
The present invention relates to a process for the insertion and conveying of a labile additive, or a mixture thereof, in a transporting pipe, in which a main stream of molten material flows, said process characterized in that it incorporates said additive, or said mixture, in a portion of the pipe delimited by the main stream, according to one of the following alternative modes: a) in a longitudinal direction with respect to the flow direction of the main stream of molten material, or b) in a transversal direction with respect to the flow direction of the main stream of. molten material, or c) according to a composition of the longitudinal (a) and transversal (b) mode, thus forming a resulting stream which keeps the labile additives segregated from the main stream of molten material.
Abstract:
The present invention relates to an agitating apparatus and to agitating hooks for same. The agitating apparatus of the present invention comprises: a rotary shaft rotatably arranged within a reactor; rotary blades arranged on the outer circumferential surface of the rotary shaft, such that the rotary blades rotate together with the rotary shaft in order to agitate materials in the reactor; and agitating hooks arranged on the inner wall of the reactor such that a pair of agitating hooks are spaced apart from each other, and the rotary blades pass through the gap between the agitating hooks. In addition, the width of the gap between the agitating hooks is formed such that an outlet for the exit of the rotary blade is wider than an inlet for the entry of the rotary blade. According to the above-described present invention, constant pressure is applied from the rotary blade inlet to the rotary blade outlet of the gap between the agitating hooks, thus minimizing the occurrence of torsional moment at the agitating hooks. Consequently, the durability of the agitating hooks is improved, and the reliability of products is increased.
Abstract:
Die Erfindung betrifft eine Vorrichtung und Verfahren zum Erwärmen von schlecht wärmeleitendem Material mittels eines Rührbehälters. Sie betrifft weiterhin die Verwendung der Vorrichtung bzw. des Verfahrens. Um eine Vorrichtung und ein Verfahren zum Erwärmen von schlecht wärmeleitendem Material mittels eines Rührbehälters (1) zu schaffen, bei denen ein kontinuierlicher Betrieb möglich ist, wird im Rahmen der Erfindung vorgeschlagen, daß der Rührbehälter im oberen Bereich einen Materialzulauf (2) und im unteren Bereich einen Materialaustritt (3) aufweist, daß in dem Rührbehälter eine zentrale Vertikaldrehwelle (4) angeordnet ist, an der mindestens ein horizontal drehbarer Abstreiferarm (8) angeordnet ist, welcher in Umlauf richtung nach oben hin schräg zuläuft, und wobei in mehreren vertikalen Ebenen beheizbare Rührarme (11) vorgesehen sind.
Abstract:
Disclosed is a liquid mixing apparatus (100) that is capable of performing thawing, degassing, mixing and kneading processes within one operation, depending on the mixing parameter that is needed for the particular liquid. This liquid mixer is well suited for stirring liquids such as industrial epoxy, solder paste, paints, printing inks, food stuffs, medicines and cosmetics. The liquid mixing apparatus has a main rotary shaft (101) that is driven by a DC motor M1 (106) to create centrifugal forces while a secondary assembly (102) that is driven by a DC motor M2 (107), spinning the secondary rotary shafts (104) at their axis through bevel gears (103) coupling. The spinning of the secondary rotary shafts (104) at their axes creates trapezoidal forces to the mixing receptacles (105) connected at an angled position. The mixing receptacles (105) have hollow housings (111) that is suitable for holding a cylindrical liquid container for example, a syringe (109) that is usually used for storing industrial epoxy. The centrifugal and trapezoidal spinning forces are capable of causing intense mixing to the liquid stored within. The centrifugal forces are utilized to create stirring effect of the mixture in the container with the additional trapezoidal spinning forces, the mixing effect is greatly enhanced.
Abstract:
The instant invention is a device for producing dispersions and method of producing dispersions. The device for producing dispersions includes a first stator, a second stator, a shell encasing the first stator and the second stator, a rotor being disposed therebetween the first stator and the second stator thereby forming a first chamber and a second chamber, at least one first inlet port into the first chamber, and at least one outlet port out of the second chamber. The device may optionally include at least one additional second inlet port into the second chamber. The method of producing a polyurethane dispersion includes the following steps: (1) providing a device for producing a dispersion including a first stator, a second stator, a shell encasing the first stator and the second stator, a rotor being disposed therebetween the first stator and the second stator thereby forming a first chamber and a second chamber, at least one first inlet port into the first chamber, at least one outlet port out of the second chamber; and optionally one or more additional second inlet ports into the second chamber; (2) introducing a prepolymer phase and an aqueous phase into the first chamber via the first inlet ports; (3) emulsifying the prepolymer phase in the aqueous phase; (4) thereby producing a prepolymer emulsion; (5) introducing a chain extender agent into the emulsion in the second chamber via the second inlet port; (6) chain extending the prepolymer; and (7) thereby producing a polyurethane dispersion.