| 摘要 |
<p>Apparatus for mixing reactive chemical components, to be fed into a mould and which must be recycled before each mixing operation, comprises a mixing head (1) provided with injectors (6, 7) for feeding the individual components, which injectors are axially slidable and are hydraulically controlled between a forward position for the injection into the mixing chamber (1), and a backward position for recycling the individual components through the injectors (6, 7) themselves. Control members (8, 10) for the mixing chamber (1) and the injectors (6, 7) are operated by devices in the form of double-acting piston-and-cylinder assemblies (9, 9a, 11, 23, 20). <IMAGE></p> |
