摘要:
The present invention relates to an oxetane derivative represented by the general formula (I): ##STR1## wherein R.sub.1 and R.sub.2 are each an acyl group and R.sub.3 is a hydrogen atom or a lower alkyl group, which is useful as an intermediate for the preparation of a compound having a (bishydroxymethyl)oxetane structure in its saccharide moiety, for example, oxetanosine, and a process for the preparation of the same.
摘要:
A manufacturing method and a manufacturing apparatus of a fiber reinforced composite material are provided, in which the whole fiber-based material is impregnated with a resin and a molding can be performed with high dimensional accuracy. A manufacturing method of a fiber reinforced composite material according to the present invention includes fixing a fiber-based material having a first surface to a first mold to provide an opening for the first surface; setting a second mold having a second surface such that the first surface faces the second surface through a space; filling resin into the space; and relatively moving the second mold and the first mold to bring the second surface closer to the first surface, such that the fiber-based material is impregnated with the resin.
摘要:
A press molding apparatus (2) may include pairs of upper and lower dies (50, 52, 54, 56, 58, and 60) arranged in series in a same direction as a die-closing/die-opening direction. Each lower die (52, 56, 60) may be slidable via a bearing (42e) to a position deviated from a die-closing/die-opening position with respect to a plate (42, 44, 46) to which the lower dire is fixed in position. The bearing (42e) inserted into each plate (42, 44, 46) via a compression spring (42d).
摘要:
A manufacturing method of composite material member includes a step of shaping a laminate including laminated prepreg sheets along a mold. The laminate includes a first layer in which fibers are oriented in single direction. In the first layer, a first surface crossing the single direction and a second surface crossing the single direction are confronted each other such that the first surface and the second surface face each other. Since the fibers are discontinuous between the first surface and the second surface, the laminate is easily shaped and wrinkles are hard to be generated in a composite material member to be manufactured from the laminate.
摘要:
The present invention relates to a method of molding a composite material structural member used mainly within structural members such as channel materials or angle materials, and also to a composite material structural member. An object of the invention is to provide a method of molding a composite material structural member that is capable of suppressing fiber creasing even for very long shapes having non-developable surfaces, and also to provide a composite material structural member.When pressing a prepreg laminate against a molding die, the method comprises a preparation step of preparing a prepreg laminate for molding by laminating a plurality of prepregs with different fiber orientations into a flat plate shape, and a pressure application step of pressing the prepreg laminate for molding prepared in the preparation step against the molding die, and in the preparation step, a specified prepreg having a fiber orientation that coincides with, or is close to, the direction of creasing occurrence is split, either within the region of creasing occurrence or in the vicinity thereof, along a direction that is effective in inhibiting creasing occurrence, and the split prepreg is then used in preparing the prepreg laminate.
摘要:
Outer diameters of upper and lower flanges of a reel are formed equal to each other irrespective of a diameter of a hub, and a cylindrical wall having the same inner diameter as the hub of the reel having the small diameter hub is provided in the reel having the large diameter hub. Thereby, there is provided a low-capacity type recording tape cartridge, in which other parts can be used both as the reel having the small diameter hub and the reel having the large diameter hub only by changing the reels and a displaced angle of a recording tape does not vary with respect to a case sidewall of a leader member.
摘要:
Textile structures for producing structural members such as reinforced spars of composite material and a method for producing the textile structures. In the textile structure at least two textile planar members, or plates, are integrally joined together by textile filaments such that the planes of the members intersect each other, at least one member being formed of layers of textile filaments which extend obliquely in at least two directions in a brace fashion with respect to the longitudinal and transverse directions of the member while the remaining members are each formed of layers of textile filaments extending along the longitudinal, transverse and vertical directions of the member.The textile structures are made by disposing filament guide members of required length in a vertical direction according to a desired configuration and design density of the structures and laying out textile filaments among said filament guide members so that they move longitudinally, transversely or orthogonally to form a plurality of textile planar members. The members are joined together by extracting the filament guide members and inserting filaments in the spaces vacated by the filament guide members.
摘要:
A turbine meter for measuring flow rates of various fluids of different coefficients of viscosity. The turbine meter has an impeller including a cylindrical body and a plurality of vanes provided on the outer peripheral surface of the cylindrical body, a tube in which the impeller is rotatably supported, guide members disposed at the upstream side and downstream side of the impeller and adapted for guiding flow of fluid passing through the impeller, and means for permitting the adjustment of the axial distance between two cone members from the outside of the turbine meter.
摘要:
A manufacturing method of composite material member includes a step of shaping a laminate including laminated prepreg sheets along a mold. The laminate includes a first layer in which fibers are oriented in single direction. In the first layer, a first surface crossing the single direction and a second surface crossing the single direction are confronted each other such that the first surface and the second surface face each other. Since the fibers are discontinuous between the first surface and the second surface, the laminate is easily shaped and wrinkles are hard to be generated in a composite material member to be manufactured from the laminate.
摘要:
A press molding apparatus (2) may include pairs of upper and lower dies (50, 52, 54, 56, 58, and 60) arranged in series in a same direction as a die-closing/die-opening direction. Each lower die (52, 56, 60) is slidable via a bearing (42e) to a position deviated from a die-closing/die-opening position with respect to a plate (42, 44, 46) to which the lower dire is fixed in position. A portion of each lower die (52, 54, 60) contacting with the bearing (42e) may include a detachable insert (42f).