| 摘要 |
An injecting device for injecting a polymer component in a mixing head (2) and for mixing it through turbulence with at least a second polymer component to produce foams and reactive polymer resins and moulded items comprises a hollow body (3), having a first axis (Al) and a supply opening (4), into which a supply conduit (5) opens for the polymer component, and a nozzle orifice (6) facing and communicating with a mixing and guide conduit (7) of the mixing head (2) that extends along a longitudinal axis (AL) that is arranged transversely with respect to the first axis (Al). A slide valve (8) for the recirculation of the polymer components slides along the longitudinal axis (AL), between a retracted position of non-recirculation, and an advanced position for the recirculation of the polymer components, is also provided. |
