DEVICE FOR PRODUCTION OF BORON THREADS Russian patent published in 1996 - IPC

FIELD: devices for production of boron threads and other thread-like reinforcing fillers of composite materials produced by pyrolysis of gas phase on heated conducting substrate. SUBSTANCE: device for production of boron threads includes assembled body in form of tubular reaction chambers and contact-gates with side openings, gas and mercury pipe unions. Contact-gate is located inside tubular reaction chambers with gas and mercury pipe unions. Contact-gate is made in form of detachable insert which consists of three parts: bushing with internal thread and two plugs with external thread adjacent to recesses. Bushing is made with side coaxial openings. Plugs have guide cones with openings in vertexes. Installed in vertex openings are spinnerets pressed to cone vertexes by fasteners. Placed in recesses are packing rings of flexible material whose width exceeds that of recess. Body of tubular reaction chamber before guide cone of insert has diameter which is less than the diameter of insert guide cone to form annular contracted width, and openings of bushing are coaxial to mercury pipe unions. EFFECT: higher efficiency. 2 cl, 1 dwg