| 摘要 |
<p>In a moulding machine for producing foundry sand moulds, the sand is compressed or packed by means of a pressure wave, acting on the sand surface produced by explosive combustion of a mixture of fuel and air. The dosing of the fuel to be burned is carried out by means of a pressure regulated supply pipe, in which a dosing container is being used, that is, filled with fuel, e.g. gas, up to an exactly defined excess pressure. This fuel or gas is thereafter led to the combustion chamber under relief of the gas pressure in the dosing container down to a lower pressure level.</p> |
