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    • 4. 发明专利
    • MANUFACTURE OF FIBER-REINFORCED PLASTIC MOLDED PRODUCT
    • JPS63170020A
    • 1988-07-13
    • JP212987
    • 1987-01-08
    • SEKISUI CHEMICAL CO LTD
    • MORIMOTO HISAOTOKUMARU MASAHIRO
    • B29C70/30B29C70/06B29K105/12
    • PURPOSE:To finish also the back side into a smooth surface and to obtain a molded product whose quality is uniform and excellent on the whole, by a method wherein the surface of a main body layer is coated with a thin film having a large number of small holes and then a laminated article which is under uncured state is shifted under atmospheric pressure. CONSTITUTION:A mold 4, for example, for a bath tub is fitted onto a turntable 2 on the inside of a vacuum chamber 1. Then main body layers 24, 25 are formed by spraying a fiber along with, for example, unsaturated polyester resin through a spray gun 9 while cutting the fiber led from a glass roving 5. Then a hydraulic cylinder is operated and a frame body 15 to which a thin film 19 of about 0.1m/m in thickness and composed, for example, of soft polyvinyl chloride resin is applied temporarily is stuck partly on the surfaces of the main body layers 24, 25, which are under an uncured state, for coating. Then the thin film 19 is broken away from the frame material 15 and then formed laminates are shifted under atmospheric pressure. Then air remaining within the main body layers 24, 25 are dispersed through a small hole 27 and bubbles or caves which have been formed within the laminates are turned into almost a crushed state.
    • 5. 发明专利
    • MANUFACTURE OF FIBER REINFORCED PLASTIC MOLDED PRODUCT AND MANUFACTURING EQUIPMENT
    • JPS6364707A
    • 1988-03-23
    • JP21002986
    • 1986-09-05
    • SEKISUI CHEMICAL CO LTD
    • MORIMOTO HISAOTOKUMARU MASAHIRO
    • B29C41/08B29C41/50B29K105/12
    • PURPOSE:To prevent quality deterioration due to a bubble and cavity, by a method wherein a reinforcement layer composed of a comparatively short reinforcing fiber and thermosetting resin is formed on a mold surface, a main body layer composed of a comparatively long inorganic fiber and a thermosetting resin is formed on the surface of the reinforcement layer and an airtight surface layer composed of a thermosetting resin is formed on the surface, in a chamber under partial vacuum. CONSTITUTION:A reinforcement layer 20 is formed by blowing fiber against a gelcoat layer of a mold 3 in the inside of a vacuum chamber 1 along with unsaturated polyester resin through a spray ran 11, while cutting the fiber in the length, for example, of 10m/m by a cutter 6. A main body layer 21 is formed by blowing the fiber against the same along with the resin through a spray gun 12, while cutting the fiber in the length, for example, of 25m/m by a cutter 7; and an airtight surface layer 22 is formed further by blowing only the unsaturated polyester resin to the whole surface. Under atmospheric pressure bubbles and cavities 23 at a flat part of the main body layer 21 are wholly collapsed, an inside corner part is entirely free from bubbles, and the bubble 23 in the inside is small and little as the reinforcement layer 20 occupies the inside corner part.
    • 7. 发明专利
    • METHOD OF MOLDING REINFORCED RESIN TUBULAR BODY
    • JPS57185116A
    • 1982-11-15
    • JP6997081
    • 1981-05-08
    • SEKISUI CHEMICAL CO LTDOKAYAMA SEKISUI KOGYO KK
    • MAYUMI MASAKATSUMISOKA KENJITOKUMARU MASAHIRO
    • B29C57/00B29C67/00B29C70/06
    • PURPOSE:To easily mass-produce reinforced resin tubular bodies whose inner configuration is complicated, by forming a reinforcing resin molding material layer around a core mold having a synthetic resin foamed body on the outer surace layer followed by the curing of the reinforcing resin molding material layer. CONSTITUTION:A reinforcing resin molding material made up of a glass fiber reinforcing material and a low-temperature curing unsaturated polyester resin liquid is wound around the tubular foamed body 1 of the core mold to form the reinforcing resin molding material layer 5, which is cured by heating it at a temperature at which the foamed body 1 constituting the core mold would not be deformed to produce the reinforced resin tubular body 6. A rotating shaft 3, a support 4, setting members 2, etc. are removed to obtain the reinforced resin tubular body 6 with the tubular foamed body 1 retained therein, and the tubular body 6 is heated with steam from the outside so that the tubular foamed body 1 can be shrinked. Then as a gap 7 is formed between the reinforced resin tubular body 6 and the tubular foamed body 1, eityer the foamed body that has been shrinked is removed as it is or it is removed after it is broken to get the reinforced resin tubular body 6.
    • 8. 发明专利
    • PRODUCTION OF COMPOSITE TUBE
    • JPS5597927A
    • 1980-07-25
    • JP646279
    • 1979-01-22
    • SEKISUI CHEMICAL CO LTD
    • YASUHARA MINORUTOKUMARU MASAHIROMARUSHITA YOSHIKAZUISHIYASU TOSHIYUKI
    • B29C67/00B29C57/00B29C70/06B29C70/16B29D23/00
    • PURPOSE:To prevent rapid deterioration at the inner surface protecting layer by forming in such a manner that the core mold is wrapped with a belt-like body containing a nonwoven cloth, a short fiber group and resin while the resin is half- hardened after the defoaming thereof under a strong pressure. CONSTITUTION:The core mold 1 is wound with a mold releasing material 2 such as cellophane tape and then, wrapped with a belt-like body having a glass fiber nonwoven cloth impregnated with a resin. Chopped strands 42 of a glass fiber previously impregnated with a resin are scattered on a glass fiber nonwoven cloth 41. Then, the nonwoven cloth is molded into a belt defoaming thereof pinched with a molding roll 5, and fully defoamed being squeezed between defoaming belts 6. Subsequently, the belt-like body 4 is wrapped over a belt-like body 4 thus formed while the resin is half-hardened with a hardening promoting device 7 to form an inner surface protecting layer B. An inner surface reinforcing resin layer 9 is formed on the layer 8 and an intermediate layer 10 done thereon. An outer surface reinforcing resin layer 11 is formed on the intermediate layer 10. The product is passed through a hardening furnace 12 and then the core mold 1 is withdrawn. Thus, a composite tube having an inner surface protecting layer 8 is obtained.