| 摘要 |
1,140,383. Casting resin-ceramic articles. LOCKHEAD AIRCRAFT CORP. 5 Jan., 1966 [5 Jan., 1965], No. 55296/65. Heading B5A. [Also in Division C3] Castings are made by preparing a ceramic filler containing 70-100 wt. per cent alumina, the balance being calcium oxide, magnesium oxide, titanium dioxide and/or zircon, heating the filler and an epoxy resin, mixing the hot resin and the hot filler at a ratio of 1 part by wt. resin to 6-10 parts by wt. filler, adding a curing agent during the mixing, pouring the mixture into a mould, vibrating the mould (preferably at 2,400-3,600 vibrations/minute at 0À01-inch amplitude) and curing the mixture by heating to 180‹ F. for 2-3 hours, 250‹ F. for 2 hours and 350‹ F. for 2 hours. The articles cast may be tools, dies, models, surface plates, lavatories and sinks. |
