Cylinder-making apparatus and method

In cylinder-making apparatus including a rotatable mandrel, resin spray means for applying settable resin on the surface of the mandrel, reinforcement supply means for supplying standed reinforcement to be applied to the surface of the mandrel, traversing means for effecting relative movement of the resin spray means and the reinforcement supply means, on one hand, and the mandrel, on the other hand, in a direction axially of the mandrel and means for supplying liquid to the resin spray means for scavenging resin from the resin spray means, the improvement comprising shield means, and supporting means supporting said shield means for movement into and out of a position interposed between the resin spray means and the mandrel for blocking ejection of liquid from the resin spray means onto the mandrel.

In cylinder-making apparatus including a rotatable mandrel, resin spray means for applying settable resin on the surface of the mandrel, reinforcement supply means for supplying stranded reinforcement to be applied to the surface of the mandrel and traversing means for effecting relative movement of the resin spray means and the reinforcement supply means, on one hand, and the mandrel on the other hand, in a direction axially of the mandrel, the improvement comprising the resin spray means including a nozzle projecting a substantially flat fan-shaped spray of resin in a plane generally parallel to the axis of the mandrel, means supporting said nozzle for turning about an axis generally parallel to the path along which resin spray is ejected from the resin spray means for tilting the plane of the resin spray between a position generally parallel to the axis of the mandrel and a position at an angle to the axis of the mandrel, and auxiliary means for effecting such turning of said nozzle independently of the traversing means for controlling the amount of resin applied to the mandrel by said nozzle at particular locations on the mandrel.

The method of applying settable resin onto the surface of a mandrel which comprises rotating the mandrel about its axis, traversing resin spray means axially along the mandrel while ejecting a spray of resin therefrom onto the mandrel, and turning the resin spray means while it is being traversed axially of the mandrel about an axis extending generally parallel to the path along which resin is ejected from the resin spray means towards the mandrel to control the amount of resin applied to the mandrel by the resin spray means at a particular locations on the mandrel.