| 摘要 |
<p>Foam reactants are mixed in a mixer head 1 and delivered into a trough (5). In the trough (5) the liquid foam reactants react to produce a creamy liquid that spills over an overflow outlet onto a fall plate (26) leading to a conveyor on which the reaction is completed to form slabstock polymeric foam. A rear wall (22) of the trough (5) is hingedly mounted (25) and adjusted to vary the volume of the trough (5). In this way, the residence time in the trough (5) is adjusted to achieve the desired consistency of liquid spilling onto the fall plate (25). A premixture of air, water and a silicone surfactant may be prepared prior to injection into other foam reactants. This results in consistency of air bubble size with optimum cell formation in the polymeric foam block.</p> |
