MANUFACTURE OF PREFORM CONTAINING ORIENTED SHORT FIBERS

• Main Authors: YAMAMOTO MOTOHIRO, FUKAZAWA MINORU
• Format: Patent
• Language: English
• Published: 16.06.1987
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; ALLOYS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; APPARATUS THEREFOR; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMISTRY; CRYSTAL GROWTH; FERROUS OR NON-FERROUS ALLOYS; MAKING GRANULES OR PREFORMS; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; PERFORMING OPERATIONS; POWDER METALLURGY; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; SPINNING; TEXTILES; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PURPOSE:To simply manufacture the titled high property preform, by extruding paraffin contg. short fibers in plastic state from nozzle, etc., to cool and solidify it, heating the obtd. solid body to remove paraffin component. CONSTITUTION:Paraffin is heated and liquefied at >=m.p., short fibers are thrown thereinto, thoroughly stirred and dispersed. Excess paraffin is removed from the obtd. short fiber dispersed paraffin liquid. Next, the paraffin is slowly cooled and extruded from nozzle or slit of extrusion apparatus while being maintained in plastic state, if necessary extrusion operation is repeated. In the process, short fibers are arranged parallelly in extrusion direction. Extruded paraffin contg. short fibers is cooled and solidified, then heated to >=400 deg.C to melt, incinerate and completely remove paraffin component. In this way, matrix substance is infiltrated and the titled preform capable of forming high property composite body is obtd.