| 摘要 |
<p>EP--90950 A Projector, contg. a device for the forced rotation of projectiles, e.g. rockets, is fitted internally with helically progressing grooves and/or ridges, provided with guide cams, or similar, adjacent to the projectile. The projector (1) is extruded with fitted weakly helically progressing grooves and/or ridges (2), from a moulding compsn. of an esp. fibre-reinforced thermoplastic resin, and calibrated. - A glass fibre-reinforced moulding compsn. contains 100 pts. wt. thermoplastic resin, esp. hard PVC, polyolefins, C2H4 copolymers, C3H6 homo- and copolymers, polyamides, polybutene, F-contg. polymers, e.g. polyvinylidene fluoride, polyvinylfluoride, C2F4 homo- and copolymers, impact- and highly impact-resistant polystyrenes (e.g. SAN, ABS), polyphenylene oxide or sulphide, polyoxymethylene, polycarbonate, polyethylene- or polybutylene terephthalate, 10-150 (30-100) pts. wt. glass fibres and opt. further inorganic fillers and/or C fibres and other additives. - A light wt. projector can be produced by a continuous process. (1/18) EPAB- EP--90950 B Projector, contg. a device for the forced rotation of projectiles, e.g. rockets, is fitted internally with helically progressing grooves and/or ridges, provided with guide cams, or similar, adjacent to the projectile. The projector (1) is extruded with fitted weakly helically progressing grooves and/or ridges (2), from a moulding compsn. of an esp. fibre-reinforced thermoplastic resin, and calibrated. - A glass fibre-reinforced moulding compsn. contains 100 pts. wt. thermoplastic resin, esp. hard PVC, polyolefins, C2H4 copolymers, C3H6 homo- and copolymers, polyamides, polybutene, F-contg. polymers, e.g. polyvinylidene fluoride, polyvinylfluoride, C2F4 homo- and copolymers, impact- and highly impact-resistant polystyrenes (e.g. SAN, ABS), polyphenylene oxide or sulphide, polyoxymethylene, polycarbonate, polyethylene- or polybutylene terephthalate, 10-150 (30-100) pts. wt. glass fibres and opt. further inorganic fillers and/or C fibres and other additives. - A light wt. projector can be produced by a continuous process. (27pp Dwg.No.1/18) - EP--90950 B Process for the continuous production of a tube from plastics material in which grooves are impressed and/or ridges are moulded on the internal surface of the tube in the longitudinal direction before the hardening of the plastics material and the tube is guided through a calibrating arrangement, characterised in that contours running helically on a stationary calibrating arrangement, which contours engage the groove or on which the ridges ride, impart to the tube an axial spiral thread. (15pp)p USAB- US4646618 A Missile launching tube comprises an extruded, glass fibre reinforced thermoplastic (pref. PVC) tube with at least one helical guide on the inside. The material contains discrete, twisted glass fibres, the axial twist orientation of which corresponds to the helical guide direction.</p> |
