| 摘要 |
1,191,946. Moulding heat resistant articles HITCO. 8 June, 1967 [9 June, 1966], No 26549/67 Heading B5A. [Also in Division F1] Heat resistant articles are made by: assembling a plurality of resin, impregnated fabric cones; compressing the cones to form a stack having at least 90% of the desired final density; subdividing the stack into longitudinal segments; internesting the segments to form a cylindrical body; and finally compressing and curing the cylindrical body into the desired article. The resin may be phenolic and the reinforcing fabric may be made of vitreous silica, asbestos, carbon, graphite and other elemental or oxide materials having the desired properties. In the described embodiment the stack of resin-fabric cones shown in cross-section in Fig. 6 is made by successively assembling the cones between complementary conical male and female dies (see Fig. 4, not shown), a slight compression being effected after the addition of each new set of cones and a full compression with heat being effected when the desired number of cones has been added. The stack is then cut into three segments 33, 34 and 35 which are internested as shown in Fig. 7 and consolidated and bonded under the stepwise application of heat and pressure in a hydroclave. |
