摘要:
Molten metal is supplied to a pouring basin formed between cooling members, such as movable cooling drums. A closed space is formed at a meniscus area whereat any one of the cooling members starts to come into contact with the molten metal, and a soluble gas or a mixture of soluble and insoluble gases is supplied to and filled in the closed space, thereby covering the meniscus area with the gas or the mixture. This arrangement enables a continuous casting of a thin metal sheet without surface cracks and having excellent surface characteristics.
摘要:
Molten metal is supplied to a pouring basin formed between cooling members, such as movable cooling drums. A closed space is formed at a meniscus area whereat any one of the cooling members starts to come into contact with the molten metal, and a soluble gas or a mixture of soluble and insoluble gases is supplied to and filled in the closed space, thereby covering the meniscus area with the gas or the mixture. This arrangement enables a continuous casting of a thin metal sheet without surface cracks and having excellent surface characteristics.
摘要:
A cooling drum for continuous-casting machines, for manufacturing thin metallic strips, and having a surface composing part of a casting mold wall in contact with molten metal, wherein the surface has numerous dimples disposed uniformly thereon and not in contact with each other, and each of the dimples has an opening portion in the form of a circle or an oval with a diameter of from 0.1 to 1.2 mm and a depth of from 5 to 100 .mu.m.
摘要:
A twin-drum continuous casting apparatus for casting a metal sheet (4) by supplying molten metal (3) to a pouring basin formed by a pair of cooling drums (1) rotating in opposite directions, and side gates (2), to cool the molten metal (3) by contact with surfaces of the cooling drums (1), thereby forming a solidified shell. The cooling drum (1) is formed from a drum body (11) having shaft portions at opposite end portions, and a drum sleeve (10) fitted on an outer peripheral portion of the drum body (11). Also, means is provided for preventing various adverse influences due to differences in thermal expansion of constituent members of the drum body (11) during casting. Thus, the reliability of the apparatus is increased, and the quality of casting is improved.
摘要:
A cooling drum can continuously cast a favorable band-shaped cast piece having little thermal deformation. The cooling drum comprises a three-layer structure including a rigid member, a cooling member metallurgically bonded to the outside of the rigid member, and a heat-resistance member plated by electro-deposition on the outer circumferential surface of the cooling member. The rigid member is made of austenite group stainless steel, the cooling member is made of Cu or Cu-alloy, and the heat-resistance member is made of either Ni or its alloy or Co or its alloy.
摘要:
A cooling drum which can continuously cast a favorable band-shaped cast piece having little thermal deformation and a method for manufacturing the same cooling drum, are disclosed. The cooling drum comprises a three-layer structure consisting of a rigid member, a cooling member metallurgically bonded to the outside of the rigid member, and a heat-resistance member plated by electro-deposition on the outer circumferential surface of the cooling member. The rigid member is made of austenite group stainless steel, the cooling member is made of Cu or Cu-alloy, and the heat-resistance member is made of either Ni or its alloy or Co or its alloy. Within the rigid member are equipped partition walls and tubular partition walls. To the opposite end portions of the rigid member are connected hollow shafts adapted to be rotationally driven, by means of bolts after shrinkage fitting. In the cooling member are drilled cooling holes for communicating a coolant as distributed over the entire circumference, extending in the axial direction of the drum. The cooling holes are communicated with a flow passageway of a coolant formed by the partition walls and the tubular partition walls through cooling passageways.
摘要:
The present inventors conducted dedicated studies and successfully constructed expression vectors that enable high-level production of foreign gene-derived proteins in mammalian host cells, which comprise a translation-impaired dihydrofolate reductase gene cistron whose expression has been attenuated by altering the codons to the least frequently used codons in mammals; and a gene cassette which has a cloning site for incorporation of a foreign gene between a highly transcriptionally active promoter and a highly stable polyadenylation signal.
摘要:
A display system displays objects in a display region in a manner arranged in a predetermined orientation. One light-emitting element of a sensor array emits light to the objects in the predetermined orientation. The display system prestores data which associates numerical value ranges different from each other with the objects, respectively. When light reflected by a finger is received by light-receiving elements of the sensor array, the display system calculates the number of the light-receiving elements that have received the reflected light, identifies one object associated with the numerical value range including the calculated number of the light-receiving elements, from among the objects, based on the calculated number of the light-receiving elements and the stored data, and performs processing corresponding to the identified object.
摘要:
A repair system which prevents heating of weakly heat resistant devices together and causing deterioration of the quality when preheating a first surface of the circuit board, wherein an electromagnetic induction material is buried in advance inside the circuit board near a specific electronic device envisioned as needed repair when becoming a defective electronic device in a production process and an electromagnetic coil emitting electromagnetic waves to an electromagnetic induction member in the vicinity of the repair device is provided and the heat generated by the electromagnetic induction member due to the electromagnetic waves enables the repair device to be heated and detached from the circuit board.
摘要:
The rotor 11 of an axial gap type motor 10 is provided with a plurality of main magnets 41 respectively magnetized in an axial direction of a rotational axis and disposed at predetermined intervals in a peripheral direction, a plurality of yokes 42 structured by a laminated member 71 produced by winding a tape-shaped electromagnetic steel plate 60 and respectively disposed on both sides of the main magnets 41 in the axial direction, and a rotor frame 30 made of a die-cast alloy and including a plurality of ribs 31 respectively interposed between the main magnets 41 adjoining each other in the peripheral direction and extending in the radial direction, and an inner cylindrical portion 32 and an outer cylindrical portion 33 respectively formed on the radially inner side of the ribs 31 and on the radially outer side of the ribs 31. According to this structure, the yokes structured by the wound laminated member and the rotor frame can be firmly unified with each other, thereby being able to secure such rigidity that can withstand a centrifugal force generated due to the rotation of the rotor and a magnetic suction force given from the stator.