摘要:
A roll bending apparatus for use in a multi-stage rolling mill adapted for rolling a hard material or a thin sheet material with a high uniformity of thickness along the breadth, with a high degree of accuracy and low energy. The rolling mill has work rolls of a comparatively small diameter. The amount of bend of the small-diameter work roll is controlled by the roll bending apparatus for attaining the high degree of uniformity of thickness along the breadth of the rolled material. The roll bending apparatus has, for each of said work rolls, a supporting member having a work roll supporting portion for rotatably supporting the work roll and rockable vertically about a fulcrum, and a bending force generating means adapted for engaging the supporting member so as to cause a rocking motion of the supporting member thereby applying a substantially vertical roll bending force to the work roll through the supporting member.
摘要:
An apparatus for drain-casting a slip comprises a mold including at least two divisible mating mold portions to form a mold cavity, a slip tank, a pump, air compressors, suction pumps, valves and tubings to connect them accordingly, supporting means of the mold portions, and a moving stand to receive the molded article thereon. The mold portion includes an air-tight vessel and a filter member inside the vessel, the filter member contains a water-drainage means, and the drainage means is communicated with the outside of the vessel. One of the mold portions has a slip supply duct and one other mold portion has an overflow duct, which ducts are communicated with the outsides of the vessels. A method using such apparatus to form hollow ceramic or porcelain ware comprises pressurizing a slip introduced into the mold cavity and preferably depressurizing the water-drainage means to deposit the slip onto the filter members, draining an undeposited slip through the slip supply duct, removing one of the mold portions by applying compressed air to the water-drainage means of the mold portion to exude some water between the filter member and the resulting molded article, depressurizing the water-drainage means of the other mold portion to attract the molded article into the mold portion, hanging the molded article attracted into the mold portion, applying compressed air to the water-drainage means as described above, and thus demolding the molded article on the stand safely.
摘要:
A continuous rolling mill has horizontal roll stands and vertical roll stands disposed alternatingly with rolling guides between the work rolls of adjacent roll stands. The roll stands together with the rolling guides are movable in the direction crossing the rolling line to an exchanging position where the work rolls and the rolling guides are exchanged with new ones. The continuous rolling mill further has a supporting frame supporting the roll stands and movable to the exchanging position thereby to bring the roll stands and rolling guides to the exchanging position, and an offsetting device adapted to move one of the adjacent roll stands relatively to the other of the adjacent roll stands and to the frame in the exchanging position such that the rolling lines of the adjacent roll stands may be offset from each other. This arrangement permits a reduction of the pitch or interval of the roll stands and affords a quick exchange of the rolls and rolling guides with new ones, contributing greatly to the reduction in installation space and cost while improving the efficiency of rate of operation of the rolling mill advantageously.
摘要:
A thermoplastic resin composition is quickly crystallizable and comprises 0.1 to 10 wt. parts of an alkali metal salt of higher fatty acid having carbon atoms of at least 26 obtained by an addition of a fatty acid to .alpha.-olefin having carbon atoms of at least 23 per 100 wt. parts of a thermoplastic polyester.
摘要:
A method for producing a gallium nitride crystal includes growing a gallium nitride crystal 5 by dissolving nitrogen in a mixed melt including gallium and sodium, and collecting the gallium 55 separated from an alloy 51 including the gallium and the sodium by reacting the alloy 51 and a liquid 52 that ionizes the sodium and separating sodium ions and the gallium 55 from the alloy.
摘要:
A group 13 nitride crystal having a hexagonal crystal structure and containing at least a nitrogen atom and at least a metal atom selected from a group consisting of B, Al, Ga, In, and Tl. The group 13 nitride crystal includes a first region disposed on an inner side in a cross section intersecting c-axis, a third region disposed on an outermost side in the cross section and having a crystal property different from that of the first region, and a second region disposed at least partially between the first region and the third region in the cross section, the second region being a transition region of a crystal growth and having a crystal property different from that of the first region and that of the third region.
摘要:
A surface-emitting laser device includes a transparent dielectric layer provided in an emitting region and configured to cause a reflectance at a peripheral part to be different from a reflectance at a central part in the emitting region. In the surface-emitting laser device, the thickness of a contact layer is different between a region having a relatively high reflectance and a region having a relatively low reflectance in the emitting region. The contact layer is provided on the high refractive index layer of an upper multilayer film reflecting mirror, and the total optical thickness of the high refractive index layer and the contact layer in the region having the relatively low reflectance is deviated from an odd number multiple of a one quarter oscillation wavelength of laser light emitted from the emitting region.
摘要:
Disclosed is a transformation method whereby an ability to produce a useful substance of a stramenopile can be improved. The method for transforming a stramenopile comprises transferring a foreign gene into the stramenopile which is a microorganism belonging to the class Labyrinthula, more specifically, to a genus Labyrinthula, Altornia, Aplanochytrium, Schizochytrium, Aurantiochytrium, Thraustochytrium, Ulkenia, etc. Said foreign gene, which is a gene relating to tolerance against an antibiotic, a colorimetric protein and/or a fatty acid desaturase (Δ5 desaturase gene, Δ12 desaturase gene and/or ω3 desaturase gene), is transferred by using the electroporation or gene-gun technique.
摘要:
A group 13 nitride crystal has a hexagonal crystal structure and at least contains nitrogen atom and at least a kind of metal atoms selected from a group consisting of B, Al, Ga, In, and Tl. The group 13 nitride crystal includes a first region located at an inner side of a cross section intersecting a c-axis, and a second region surrounding at least a part of an outer periphery of the first region, having a thickness larger than a maximum diameter of the first region, and having a carrier density higher than that of the first region.
摘要:
A method for producing a group 13 nitride crystal, comprises a crystal growth step of reacting nitrogen and a mixed melt containing at least a group 13 metal and at least one of an alkali metal and an alkaline earth metal, in the mixed melt, to grow a nitride crystal on a seed crystal, wherein at least one of the mixed melt and the seed crystal is rotated in the crystal growth step, a relative speed between the mixed melt and the seed crystal in the crystal growth step is repeatedly fluctuated in accordance with one or a plurality of types of predetermined patterns, and a maximum value of the relative speed indicated by the pattern is 0.01 m/s or more.