| 摘要 |
<p>The invention relates to a method and an installation for producing centrifugally cast, glass-fibre reinforced plastic tubes. According to said method, a liquid, curable resin which can contain a filler is introduced into a rotating die together with glass-fibres, curing additives and also optionally sand. During the introduction of the raw materials, the quantity and type of the additives are successively adapted with respect to the die temperature, in such a way that gelation begins in the outer part of the tube when the last portion of raw material is introduced. At gelation, the temperature of the outer part is lower than that of the inner part and gelation only begins in said inner part of the tube, once all the raw materials have been introduced.</p> |
