摘要:
A method and an apparatus for spinning a multifilament yarn of a thermoplastic material, wherein the thermoplastic material is extruded through a spinneret to form a downwardly advancing filament bundle. The filaments then advance through a cooling device with two cooling zones. In the first cooling zone, an air stream is directed substantially transverse to the direction of the advancing filaments, and in the second cooling zone, cooling occurs by a cooling stream composed of a mixture of air and liquid, with the cooling stream flowing oppositely to the direction of the advancing filaments. The advancing filaments are gathered to form a multifilament yarn, which is then wound into a package.
摘要:
A process and a device are described for production of a dial by imprinting a blank with an imprint which enable cost-effective production in very high quality even with small quantities. Data entered via an input device 110 are delivered to a data management device 120, which positions the dial pattern on a printing master defined by the data entered. If a pattern is not stored in memory, a new pattern is requested from a design device 130 and delivered to the data management device 120, which enters the printing master into an output device 140. The output device 140 generates the printing master according to drawing data and outputs it to a printer 200 which creates a prefixed toner image 11 on a carrier sheet 10. The blank 20 to be imprinted and the carrier sheet 10 with the toner image 11 mirror-inverted to the imprint are introduced into a press 300 and the blank 20 is aligned in a predefined position and the carrier sheet 10 is aligned in a predefined position corresponding to the position of the blank 20. By softening the toner image 11 and pressing the toner image 11 onto the blank 20, the toner image 11 is transferred from the carrier sheet 10 to the blank 20 and forms, together with the blank 20, a dial 30 provided with the imprint. Then, the carrier sheet 10 may be removed from the transferred toner image and the dial 30 removed from the press 300. The press 300 may be designed as a flat press, a roller press, or a combination of the two.
摘要:
An extruder for melting plastic granules which is designed as a two-stage system in an integrated structural unit with an extruder chamber having an extruder screw in a heatable housing, as well as with a drying chamber having a heated conveying screw with displacement elements which dry the plastic granules and axially convey them to the extruder chamber without compression. In a preferred embodiment, the conveying screw has a larger diameter than the extruder screw, and displacement elements of greater depth than the extruder screw.
摘要:
A device for measuring the flow of a fluid flowing through a measuring pipe includes coils arranged above and below the measuring pipe and a pair of electrodes facing each other on the sides of the measuring pipe. The coils are excitable for producing aiding and opposing magnetic fields. A correction circuit corrects the voltage between the electrodes, which is only approximately proportionate to the flow of the fluid in the presence of aiding magnetic fields, to an output signal S which is proportionate to the flow of the fluid, by means of a correction function Ug/Ur which depends on the voltages Ur,Ug between the electrodes in the presence of aiding and opposing magnetic fields. Separate correction signals are determined depending on whether the Froude number of the flow in the measuring pipe is greater than or less than one. One of the correction signals is applied to the voltage Ur which corresponds to the aiding magnetic field, for producing an output signal S.
摘要翻译:用于测量流过测量管的流体的流量的装置包括布置在测量管的上方和下方的线圈和在测量管的侧面彼此面对的一对电极。 线圈是可激励的,用于产生辅助和相对的磁场。 校正电路通过校正功能来校正电极之间的电压,其仅在有助于磁场的情况下与流体的流量成比例地与输出信号S成比例,该输出信号S与流体的流动成比例 Ug / Ur,其取决于在有助于和相对的磁场的情况下电极之间的电压Ur,Ug。 单独的校正信号取决于测量管中的流量的弗劳德数是否大于或等于1。 校正信号中的一个被施加到对应于辅助磁场的电压Ur,用于产生输出信号S.
摘要:
A method of alignment of two parts comprises separating the two parts and producing images of the separated parts, breaking down the images into image points with a spacing smaller than the required accuracy, digitalizing the information content of the image points and comparing the actual position of the parts, taking into account the initial separation, and moving the two parts, into alignment from the results of the comparison.
摘要:
The aim of the invention is to improve the electrical and mechanical properties of a litz wire conductor (1) for coils of electric machines. For this purpose, the interstices between the filaments (3) of a conductor (1) are filled with an elastic potting compound (4). In order to allow for more regular marginal field intensities in the circumferential area, the potting compound (4) can be electrically conducting. For filling the interstices, the individual filaments (3) can also be provided with a coating which accelerates curing of the steeping agent.
摘要:
This invention describes a novel recombinant gene expression method based on a novel recombinant gene expression vector, comprising in the following order a promoter sequence, a gene of interest, a translational stop signal and translationally linked to said gene of interest a selectable marker gene.
摘要:
A melt spinning apparatus for extruding and spinning thermoplastic filaments as part of the fabrication of a multi-filament yarn. The apparatus includes a plurality of spinning units arranged in a row in a gas tight heated container, and each spinning unit comprises upper and lower coaxial pipes which are interconnected by means of a common supporting plate. The melt metering pump and the spinneret assembly are mounted within the pipes. A method of fabricating the apparatus is also disclosed.
摘要:
A sealing device comprises a slide ring and a counterring having sealing surfaces, the slide ring and counterring contacting one another under axial prestressing in a sealing manner and capable of rotating relative to one another, the counterring and a substantially L-shaped engaging ring being interconnected, the engaging ring being affixed to a shaft to be sealed, and the counterring and the engaging ring being sealed relatively to each other by a sealing ring. The counterring contacts a radial segment of the engaging ring and surrounds an axial segment with radial clearance, and the sealing ring is sealingly arranged, under elastic prestressing, in the gap formed by the clearance. The counterring has an inner peripheral surface which forms an angle .alpha. of about 0.5.degree. to about 60.degree. with an axis of rotation, and the radial clearance in which the sealing ring is arranged is greater on the side facing the radial segment of the engaging ring than on the side facing the slide ring.
摘要:
A double-belt system for processing viscous melts includes a driven upper belt having a lower working run, and a driven lower belt having an upper working run spaced beneath the lower working run to form a gap therewith for receiving a viscous melt. A gap-adjusting mechanism includes upper rollers engaging an upper surface of the lower working run, and lower rollers engaging a lower surface of the upper working run. A distance between the upper rollers and lower rollers is adjustable to vary a size of the gap. A compensation mechanism is disposed over the lower working run to apply an upward force thereto for pulling the lower working run against the upper rollers, thereby resisting sagging of the lower working run. At least one delivery mechanism applies a temperature-controlled liquid across an entire width of the lower working run for controlling a temperature thereof. The liquid is extracted by an extraction mechanism disposed downstream of the delivery mechanism. Vertically adjustable stops are provided for determining a vertical position of respective ones of the upper rollers.