| 摘要 |
Foundry moulds made of sand and a resin binder require a gaseous catalyst for hardening of the prepared mould. The invention contemplates a simple apparatus with inlet end 15 easily connected to a unit 13 producing pressurised air and with an outlet end 7 easily connected to a foundry mould 4. Between said two ends 7, 15 are arranged two parallel-connected branches 8, 10, 12 and 9, 11, 16- 21, the one of which 8, 10, 12 is designed for flushing with pressurised air and the other 9, 11, 16-21 is designed to produce and deliver a gaseous catalyst. <IMAGE> |
