摘要:
The invention relates to a process for producing a two-dimensionally extending metallic microstructure body having a multitude of minute openings the dimensions and distribution of which may be predetermined. A tool having microstructures on the surface thereof, which microstructures taper outwardly, is pressed into the electrically insulating layer of a molding material comprising an electrically insulating layer and an electrically conducting layer, so that the microstructures project at least through the insulating layer, to form an impression in the molding material. The tool is withdrawn from the molding material to form an impression in the molding material comprised of openings which taper in the direction of the electrically conducting layer. The impression of the molding material is electroplated with a metal to fill the openings with metal to form a two-dimensionally extending metallic microstructure having adjacent metal fillings and minute openings, by filling the openings in the impression to a height at which the distance between adjacent fillings corresponds at the surface of the fillings to the predetermined dimensions of the two-dimensionally extending metallic microstructure. The molding material is removed from the two-dimensionally extending metallic microstructure.
摘要:
A method and a device for producing a dispersed mixture from at least two phases. To do this, the first and the second phase are subdivided into split streams so that the split streams from the first phase are located on a first flat layer and the split streams from the second phase are located on a second flat layer, the split streams of the first phase inside the flat layer being fed onto the split streams of the second phase at an angle in order to bring about a dispersion and mixing process, wherein the flat layers are directly arranged on top of each other, and parallel to each other. The device consists of at least one base unit containing two foils into which a parallel assembly of grooves is inserted on one side of each foil. Both foils are configured in the base unit such that the sides of the foils fitted with grooves lie on top of each other and form an angle with each other.
摘要:
A method of manufacturing a plastic article having micro-openings defined therein by working a semi-finished plastic structure having microrecesses defined on one side thereof, the method including, in the order recited, providing a semi-finished plastic structure having opposing first and second sides, wherein the first side of the opposing sides has microrecesses defined therein; filling the semi-finished plastic structure to cover the microrecesses with a substance which is hardenable and selectively removable; hardening the substance; machining the surface of the hardened substance to smooth it; clamping the semi-finished plastic structure onto a vacuum tensioning device with the smoothed surface of the hardened substance in contact with the vacuum tensioning device; machining the second side of the opposing sides of the semi-finished plastic structure until the microrecesses of the first side are at least partially exposed thereby defining micro-openings in the structure; and removing the hardened substance selectively from the microrecesses.
摘要:
In an apparatus for culturing cells which comprises a plate-like body with a lattice structure having openings separated from one another by sidewalls and a bottom disposed on one side of the lattice structure and having passages permeable for liquids but not for cells so as to form, with the lattice structure, cavities for receiving cells to be grown therein, the cavities have a clear width of between 50 .mu.m and 1000 .mu.m and the bottom consists of a material to which cells placed into the cavities will not easily attach so that the cells grow from the side walls of the cavities causing them to form a three-dimensional cell structure.
摘要:
In a static micromixer a flow guide structure consisting of a stack of foils provided with passages formed into alternate foils so as to extend between a mixing chamber at one end of the flow guide structure and different admission chambers at the opposite end of the flow guide structure, the passages are curved so that they are all parallel at their exit ends adjacent the mixing chamber and, at their entrance ends, the flow guide structure has face areas which are inclined with respect to the exit end face of the flow guide structure at such an angle that the curved passages have all about the same length.
摘要:
A method of producing a finely structured body comprised of a plurality of stacked, cut sections of foil at least one of which is provided with grooves. A machinable foil is wrapped around a cylindrical mandrel of a lathe to overlap opposing edges. The overlapped edges are clamped into an axial recess of the cylindrical mandrel by means of a clamping means and a plurality of grooves cut into the surface of the foil by means of at least one shaping diamond positioned in a feed which is finely adjustable. The plurality of grooves each have a groove length, a groove width, and a cross-sectional shape that is constant over the groove length and is freely selectable. Then, the grooved machinable foil is cut into cut sectoins and the cut sections are stacked. The plurality of grooves have a form precision such that, for groove lengths of more than 1000 .mu.m, the groove width has an accuracy of about .+-.1 .mu.m for land widths which equal or exceed about 15 .mu.m. Alternately, the machinable foil may be stretched over a vacuum clamping means comprised of a ground, sintered metal plate positioned on a work table which is movable in two mutually perpendicular directions X and Y and a plurality of grooves cut into the surface of the machinable foil by means of at least one shaping diamond positioned on a cutting spindle and adjustable in a direction Z.
摘要:
In the process for the continuous dispersion of at least one fluid A constituting the disperse phase and at least one continuous phase constituting the enclosing phase of a fluid B, at least one fluid stream A and at least one fluid stream B are fed into a dispersion apparatus and come into contact therein in a dispersion chamber. To this end, a microstructure dispersion apparatus (1a, 1b, 3a, 3b) is used in which the fluid streams A, B are broken up into spatially separate, flowing fluid filaments by a system of microchannels (1a, 1b) associated therewith, which filaments are discharged into the dispersion chamber (4) at identical flow velocities for the particular fluid in such a manner that on discharge into the dispersion chamber (4) a fluid jet (6a) of the disperse phase is in each case immediately adjacent to a fluid jet (6b) of the continuous phase and in each case a fluid jet (6a) of the disperse phase is enclosed as it is broken up into particles in the adjacent fluid jets (6b) of the continuous phase.
摘要:
A microstructures lamellae mixer comprising a guide component for supplying fluids to be mixed to a mixing chamber, the guide component being composed of a plurality of foils which are layered one above the other and into which microchannels are incorporated such that separate fluids supplied to the guide component are formed into spatially separated microstreams which then emerge adjacent to each other in a mixing chamber.
摘要:
In the reaction process, at least two educts A, B are divided by a system, assigned to each of them, of slit-like microchannels 1a, 1b into spatially separate fluid lamellae, which then emerge into a common mixing and reaction space 4. The fluid lamellae here have a thickness
摘要:
In a static micromixer for mixing at least two fluids including a flow guide structure having a longitudinal axis extending in the general flow direction of the fluids through the guide structure, separate fluid admission areas disposed at the entrance end of the flow guide structure and a mixing chamber disposed at the exit end of the flow guide structure, the flow guide structure is formed by foils of a thickness of about 100 .mu.m disposed on top of each other and having parallel grooves extending in one foil from one of the fluid admission areas at an angle with respect to the general fluid flow direction through the flow guide structure to the mixing chamber and in an adjacent foil from another of the fluid admission areas to the mixing chamber such that in the mixing chamber the fluid exits of different foils are disposed adjacent each other, the grooves having a width of less than 250 .mu.m and being spaced from each other by less than 70 .mu.m to provide for the fluid flow filaments entering the mixing chamber at different angles and closely adjacent each other.