摘要:
An optical switch disposed in intermediate positions of optical paths to define a channel of a light signal constitutes a cell member in whose interior cells are formed and a waveguide member having fine slits; and a gas is filled in cells of which side walls are formed by piezoelectric/electrostrictive elements or antiferroelectric elements, a liquid is filled in the fine slits, and the cells and the fine slits are communicated to each other via a communicating hole; optical waveguides intersect at the fine slits, and the-cells are disposed at the crossing locations, and said side walls are expanded/constricted by applying an electric field to the piezoelectric/electrostrictive elements or antiferroelectric elements which form the side walls of the cells, and a part of the gas stored in each cell is ejected at a corresponding intersection area from said communicating hole into the corresponding fine slit.
摘要:
A fabrication method of an industrial part having high-aspect-ratio through-hole sections using a punch and a die, includes a first step of drilling a first hole section in a first sheet of sheet material with the above punch; a second step of lifting the above first sheet in tight contact with a stripper; a third step of lifting a tip section of the above punch so as to be slightly drawn in from a bottom section of the above lifted first sheet; a fourth step of drilling a second hole section in a second sheet of sheet material with the above punch; a fifth step of lifting the above second sheet in tight contact with the above first sheet; a sixth step of lifting the tip section of the above punch so as to be slightly drawn in from the bottom section of the above lifted second sheet, and, the subsequent steps of repeating the above fourth to sixth steps for lamination of a plurality of sheets of sheet material. Industrial parts may be fabricated, where fine through-hole sections, in which their diameter is very small, for example, 100 &mgr;m or less, and their axial length is longer by a predetermined mount or more compared with that of their diameters, are provided at high density with similar accuracy to that of hole sections drilled in one sheet of thin sheet material, even when using soft material which can be deformed.
摘要:
A piezoelectric actuator includes comb teeth-shaped piezoelectric actuators, each comprising plural piezoelectric layers. A side surface of each tooth is fired. Actuators are made by (1) preparing a plurality of piezoelectric material green sheets on which electrode films are formed and forming slits on a first green sheet using a punch and a die, (2) pulling up the first green sheet using a stripper, (3) pulling up a top portion of the punch slightly from the lowest portion of the pulled up first green sheet, (4) forming second slits in a second green sheet by the punch, (5) pulling up the second green sheet jointly with the first green sheet, and (6) pulling up the top portion of the punch slightly from the lowest portion of the pulled up second green sheet, and thereafter laminating green sheets by repeating steps (4) through (6). The layers can thereafter be fired.
摘要:
A piezoelectric actuator includes comb teeth-shaped piezoelectric actuators, each comprising plural piezoelectric layers. A side surface of each tooth is fired. Actuators are made by (1) preparing a plurality of piezoelectric material green sheets on which electrode films are formed and forming slits on a first green sheet using a punch and a die, (2) pulling up the first green sheet using a stripper, (3) pulling up a top portion of the punch slightly from the lowest portion of the pulled up first green sheet, (4) forming second slits in a second green sheet by the punch, (5) pulling up the second green sheet jointly with the first green sheet, and (6) pulling up the top portion of the punch slightly from the lowest portion of the pulled up second green sheet, and thereafter laminating green sheets by repeating steps (4) through (6). The layers can thereafter be fired.
摘要:
A wire sawing apparatus includes a wire, a wire feed roller, and two basic rollers. The three rollers have the same diameter and are arranged in such a manner that their axes of rotation are in parallel with one another. Cutting-positioning circumferential grooves are formed on the two basic rollers at axially paired same positions. Intermediate circumferential grooves are formed on the wire feed roller and arranged in the axial direction such that the axial position of each intermediate circumferential groove corresponds to an axially central position between two adjacent pairs of cutting-positioning circumferential grooves. The wire is spirally wound a plurality of turns on the three rollers while being fitted into the circumferential grooves.
摘要:
An intermediate laminated structure is provided including a plurality of unfired ceramic plates stacked along a laminating direction. Each of the plates has a plurality of holes formed therethrough by a punching operation. At least a first hole in one of the plurality of unfired ceramic plates has the same shape and cross-sectional area as respective first holes in the remaining plurality of unfired ceramic plates such that the first holes define a cylinder of constant cross-sectional area throughout the entire thickness of the intermediate laminated structure.
摘要:
An optical switch disposed in intermediate positions of optical paths to define a channel of a light signal constitutes a cell member in whose interior cells are formed and a waveguide member having fine slits; and a gas is filled in cells of which side walls are formed by piezoelectric/electrostrictive elements or antiferroelectric elements, a liquid is filled in the fine slits, and the cells and the fine slits are communicated to each other via a communicating hole; optical waveguides intersect at the fine slits, and the cells are disposed at the crossing locations, and said side walls are expanded/constricted by applying an electric field to the piezoelectric/electrostrictive elements or antiferroelectric elements which form the side walls of the cells, and a part of the gas stored in each cell is ejected at a corresponding intersection area from said communicating hole into the corresponding fine slit.
摘要:
In a molding die machining electrode, slit grooves of a molding die are machined with a slit groove forming part having a substantially circular outer circumference by arranging hexagonal erected wall parts in a row; while the inner circumference of a slit groove forming part overlaps with the erected wall parts in the outer circumference of the slit groove forming part, the outside slit grooves are machined with the slit groove forming part having a substantially circular outer circumference. The further outside slit grooves are machined with the slit groove forming part of the third electrode. A plurality of the slit groove forming parts are radially divided and overlapping portions between the plurality of the slit groove forming parts are formed substantially coaxially with a molded body. The areas of the slit groove forming parts are designed to nearly similar values, suppressing the difference in wear of the electrodes.
摘要:
There is disclosed a small and thin ink jet head having an excellent productivity, in which Piezoelectric elements capable of developing a large displacement amount and a high displacement generation force can highly densely be arranged together with ink chambers and nozzles and in which generation of crosstalk is inhibited. A discharge device comprises a channel section in which a plurality of channels are formed, each channel having an introduction hole, a pressurizing chamber and a discharge hole; and an actuator section having a top plate, a pair of support walls arranged at opposite ends of the top plate and a plurality of piezoelectric elements hanging from the top plate, spread between the pair of support walls, arranged independently of one another and forming pairs with the channels.
摘要:
A piezoelectric/electrostrictive device is provided with a stationary portion, a thin-plate portion supported by the stationary portion, and piezoelectric/electrostrictive element formed by alternately laminating a plurality of electrodes and a plurality of piezoelectric/electrostrictive layers. The piezoelectric/electrostrictive device is produced by cutting a thin-plate body that composes the thin-plate portion afterward and a laminated body comprising the piezoelectric/electrostrictive layers and thereafter applying prescribed specific processing (for example, heat treatment) to the cut plane (the lateral end surfaces). By so doing, the ratio of the actual surface area of the lateral end surface of the piezoelectric/electrostrictive element to the area of the lateral end surface of the piezoelectric/electrostrictive element in the orthographic projection is four or less, and the deposition of moisture on the lateral end surfaces is suppressed to the extent of not substantially generating electric leakage or ion migration.