| 摘要 |
<p>1. Mixing head for producing a chemically reactive mixture from at least two components, in particular a mixture of isocyanate and polyol reacting to form polyurethane, which comprises a bore (2) with an axially displaceable plunger (3) and in the wall of the bore for the formation of a mixing chamber, two nozzles (5, 6) for supplying the components, the plunger conveying the mixture produced from the bore, the mixing head comprising an additional bore (4), the axis of the bore (2) and the axis of the additional bore (4) intersecting, a member (7) being located in the additional bore (4) and the member substantially wiping off the film of mixture formed on the plunger (3) during the axial movement of the plunger, after cleaning of the mixing chamber, characterised in that the member is a ceramic member.</p> |
