| 单词 | rapping bar |
| 释义 | > as lemmasrapping bar rapping bar n. Founding a pointed iron bar for loosening patterns from moulds, which is inserted vertically into a hole in the pattern and caused to vibrate by being struck with a hammer. ΘΚΠ society > occupation and work > equipment > metalworking equipment > [noun] > casting equipment > mould > equipment for loosening from mould rapping bar1888 ingot stripper1904 1888 Lockwood's Dict. Mech. Engin. 277 Rapping bar. 1948 H. W. Baker Mod. Workshop Technol. i. iii. 60 For a wood pattern the rapping bar may be pointed and driven into the wood itself; or special rapping plates with suitable holes may be fixed to it. 2000 C. W. Ammen Metalcasting iv. 60 The rapping bar consists of a piece of brass or steel (cold roll) rod which is machined or ground to a tapered point. < as lemmas |
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