Apparatus for manufacturing products composed of fibers agglomerated with synthetic resins

Abstract

Abstract THE PRODUCTION OF RUNNING LENGTHS OF HARDENED COMPOUNDS OF FIBERS THOROUGHLY IMPREGNATED WITH SYNTHETIC RESIN, WHICH MAY BE CUT INTO SMALL FRAGMENTARY PIECES ADAPTED TO SERVE AS A CHARGE FOR MOLDING PLASTIC BODIES WITH A FIBER REENFORCEMENT. THE STRANDS OF THE FIBERS ARE REELED FROM A SUPPLY, AND THE INDIVIDUAL FIBERS ARE SEPARATED FROM EACH OTHER BY AIR CURRENTS OR ELECTROSTATIC CHARGES OF THE SAME POLARITY. SYNTHETIC RESIN IN POWDERED FORM IS APPLIED TO THE SEPARATED FIBERS TO EFFECT A THOROUGH INTERMINGLING BETWEEN THEM WHICH IS FOLLOWED IMMEDIATELY BY A PRELIMINARY HEATING OF THE COMPOSITE PRODUCT TO EFFECT A FUSING OF THE RESIN WITH THE FIBER COMPONENT. THIS FUSING IS FOLLOWED BY A MORE INTENSE HEATING AND SHAPING OF THE COMPOSITE PRODUCT INTO CONTINUOUS REEDS, WHICH, AFTER COOLING AND HARDENING MAY BE CUT UP INTO SMALL PIECES OF ANY DESIRED SIZE. A SPECIAL FEATURE OF THE INVENTION RESIDES IN SEPARATING THE FIBERS OF THE STRANDS FROM ONE ANOTHER BY APPLYING AN ELECTROSTATIC POTENTIAL OF THE SAME POLARITY TO THE FIBERS TO PRODUCE A REPULSIVE FORCE THEREBETWEEN, AND BY APPLYING AN ELECTROSTATIC POTENTIAL OF OPPOSITE POLARITY TO THE POWDERED PARTICLES OF THE RESIN, TO INDUCE AN ATTRACTIVE FORCE BETWEEN THESE PARTICLES AND THE FIBERS, AND THE ULTIMATE THOROUGH FIXATION OF THESE PARTICLES ONTO THE FIBERS, IN CONSEQUENCE OF THE HEATING AND MOLDING THEREOF BY THEIR PASSAGE THROUGH THE OPENINGS IN HEATED SPINNERETS OR ANALOGOUS HEATING AND SHAPING DEVICES.

Inventors

• 👤 Jean Lamanche
• 👤 Gerard Buisson

Bibliographic Details