摘要:
The invention relates to a hot-top mold for a strand casting apparatus, consisting of a hot-top, which lies on the upper side of a parting agent distributor and presses it with its underside against the surface of a mold, an overhang being formed on the radially inner surface of the hot-top, which protrudes beyond the parting agent distributor in the direction of take off of the strand, the hot-top being centered and held by an outer ring, which is releasably fastened to the mold. The mold surrounds a function ring toward the bearing surface of the mold which, together with the parting agent distributor, forms function surfaces with adjustable roughness on the surfaces. In the parting agent distributor, radial channels are formed at the upper side and the underside, the channel cross sections at the upper side and the underside being in a ratio of 1:3 to 1:5 to one another.
摘要:
The invention relates to a cutting device having a cutting unit that divides a strip from a material web moving in a transport direction relative to the cutting device, and having a base support that defines a cutting section that supports the material web during the division of the strip, and a supporting section following in the transport direction, which is formed and arranged in such a way that it supports the cut material web and the strip as they are transported away out of the cutting section in the transport direction, wherein the supporting section has, at least in some sections, a transport surface that moves in the transport direction and which is formed and arranged in such a way that the cut material web and/or the strip is/are carried along on the transport surface in the transport direction, at least in some sections.
摘要:
In a procedure to produce a nerve or other transplantation material, the basal membranes of muscles are colonized with Schwann cells. The colonized basal membrane structure is placed into a nutrient Solution. The Schwann cells are positioned generally continuously along the longitudinal direction of the fibers of the basal membrane over generally the entire length of the implanted material, and the basal membrane thus colonized remains in the nutrient solution until the Schwann cells have aligned themselves generally uniformly and continuously along the longitudinal dimension of the fibers.
摘要:
Mold apparatus for continuous casting of metal, has an intermediate plate for supplying one or more mold release agents to the surface of the billet or ingot forming in a cooled mold. The intermediate plate has outlet openings which terminate in an intermediate area between a hot top section and a mold section in which the molten metal solidifies. The intermediate release agent supply plate having a central cross sectional opening is provided between the hot top section and the mold section, the surface of the central opening, adjoining the surfaces of the hot top section and the mold section. The intermediate plate comprises a flat plate having release agent-supply channels that extend to the opening edge and are precision-formed into the upper and lower surfaces of the intermediate plate to a constant depth. Liquid and/or gaseous mold release agents are fed through the supply plate to lubricate the mold surface along which the ingot is formed, cooled and lowered.
摘要:
A vibration-damping holding device for holding at least one pipeline having a holding body of a hard-elastic material and a receiving body of a soft-elastic material insertable into said holding body, the holding body having a lower part adapted to be anchored to a carrier plate, an upper part and resilient locking hooks for releasably connecting them to one another in a closed position, the upper and lower parts forming a cavity between them in the closed position for receiving the receiving body. The receiving body also has two parts that can be assembled together to form the body, each of the parts having an outer shell with an outer shape compatible with the cavity in the holding body and at least one semi-annular inner shell that cooperate as a pair with each other to hold a pipeline. The inner shells are connected to the outer shells by a plurality of annularly spaced spring struts that extend radially outward from the inner shell, the struts being V-shaped with the vertices of the V's pointing alternatively towards one side or the other relative to the axis of inner shells and the pipeline.
摘要:
In a die-casting machine for producing castings from metals or metal alloys, which castings have a low content of gas, pores and oxides, melt is drawn by means of a vacuum out of a holding device (10) via a suction tube (11) into a casting chamber (3). A casting plunger (7) closes the inlet opening (16) to the casting chamber (3). In order to achieve as low as possible mechanical surface pressure due to flow of the melt, and fluviatile erosion of the die-side end of the inlet opening (16), and thus avoid high wear of this inlet edge or of the casting chamber with casting plunger, a planar or linear inlet cross-section (24, 27) as well as a curved deflection surface (20) on the casting plunger (7) are provided.
摘要:
The present invention relates to hardenable mixtures containing:(i) a polyglycidyl ether or ester based on an aliphatic, cycloaliphatic or aromatic alcohol or a corresponding carboxylic acid and(ii) a hardener obtainable by reaction of:(A) a mixture of 2-4 mol of a monohydric, aliphatic alcohol and 1 mol of phosphorus pentoxide in an inert organic solvent, or of 2 mol of a dialkyl phosphate or of 2 mol of phosphoric acid, if appropriate in combination with 1-2 mol of a monohydric, aliphatic alcohol, with(B) 0.5-1.5 mol of a diglycidyl ether based on a cycloaliphatic or aromatic diol,with the proviso that the said diglycidyl ether used for the preparation of the hardener has an average molecular weight (number-average) of not more than 2,500 and the said hardener is essentially free from 1,2-epoxide groups.The hardenably mixtures are suitable in particular for the production of coatings.
摘要:
A device for controlling an unwinding of a continually fed material web in a printing machine comprises a web storage to which the web is loaded from the unwinding roller and which includes a housing-fixed roller group and a movable roller group. An inlet and an outlet rollers of the housing-fixed roller group are rotation-angle coupled with each other. The web storage serves as a control device for controlling the peripheral speed of the unwinding roller in dependence on the speed of the draw-in device.
摘要:
An artificial humerus head has a groove in its exterior surface for receiving the long biceps tendon. A cover bridges the groove to form an elongated open-end channel for the tendon and makes it possible to arrange the long biceps tendon in the channel without separation thereof from the head.