| 摘要 |
<p>The invention relates to a method and installation for the purpose of manufacturing centrifuged glass fibre-reinforced synthetic material pipes, wherein liquid curable resin, which can contain a filler, together with glass fibres and additives for the curing process, possibly also with sand, is introduced into a rotating mould. With respect to the mould temperature as the raw materials are introduced, the quantity and type of additives are adapted in a successive manner such that gelling commences in the outer part of the pipe when the last part of the raw materials is introduced. Upon gelling, the temperature is lower in the outer part than in the inner part and gelling only commences in the inner part of the pipe after all of the raw materials have been introduced.</p> |
