PLASTIC TUBE WITH OUTSIDE MASSIVE CROSS RIBS, APPARATUS FOR APPLICATION IN AN INSTALLATION FOR THE FORMING OF SUCH PIPES; INSTALLATION FOR FORMING PIPES CONTAINING SUCH A DEVICE AND METHOD FOR FORMING A PLASTIC TUBE USING SUCH AN INSTALLATION

摘要

The invention relates to a tube (1) having solid transverse ribs (3) at the outside and a smooth inner surface in which at least one end has a smooth outer surface (4) having a wall thickness which may be chosen free, i.e. greater than, equal to or smaller than the smallest thickness of the tube between the ribs. The invention also relates to a device for moulding a tube according to the invention, an installation having such a device and a method for producing a tube using such an installation which includes a device according to the invention. In the device at least part of the half-moulds used for forming comprises at least a smooth inner surface corresponding to a section of tube having a smooth outer surface.