초록 ▼

Resin-coated filaments wound around a mandrel to make a plastic pipe or fittings. In making a fitting with a nonlinear axis, the mandrel is supported with one end adjacent a winding station and rotated about an axis substantially tangent to the nonlinear axis at the winding station. The rotating man

Resin-coated filaments wound around a mandrel to make a plastic pipe or fittings. In making a fitting with a nonlinear axis, the mandrel is supported with one end adjacent a winding station and rotated about an axis substantially tangent to the nonlinear axis at the winding station. The rotating mandrel oscillates back and forth past the winding station while maintaining the nonlinear axis substantially tangent to the axis of rotation. Resin-coated filaments pass between longitudinally spaced and curved guide fingers and are wrapped around the rotating mandrel in overlapping helical patterns as it moves back and forth past the winding station. The mandrel is removed from the fitting after the resin has cured.

대표청구항 ▼

A method for making a pipe fitting having a nonlinear centerline lying in a substantially flat plane by wrapping filaments around a mandrel in the shape of the fitting, the method comprising the steps of: disposing the mandrel adjacent a winding station; rotating the mandrel about an axis which is f

A method for making a pipe fitting having a nonlinear centerline lying in a substantially flat plane by wrapping filaments around a mandrel in the shape of the fitting, the method comprising the steps of: disposing the mandrel adjacent a winding station; rotating the mandrel about an axis which is fixed in space and which lies in the plane of the nonlinear centerline; passing the rotating mandrel through the winding station while maintaining the nonlinear centerline substantially tangent to the axis of rotation at the winding station; wrapping filaments around the mandrel in a curved path as it moves past the winding station; and applying a curable resin to the filaments. Apparatus for making a nonlinear pipe fitting by winding filaments in continuous curved paths around a mandrel in the shape of the fitting, the mandrel having a longitudinally extending nonlinear centerline, the apparatus comprising: a spindle having a longitudinal axis; an outwardly extending bracket secured to the spindle; means for securing the mandrel to the bracket; dispensing means for supplying filaments to the mandrel; means for rotating the spindle about its longitudinal axis, the axis of spindle rotation having a fixed orientation relative to the dispensing means; means for simultaneously moving the bracket and mandrel laterally and longitudinally relative to the spindle about an axis spaced from and transverse to the spindle axis as the spindle rotates to cause the centerline of the mandrel to move through a point substantially on the longitudinal axis of the spindle and at a substantially fixed distance from the last point of contact between the filaments and the delivery means so the filaments wind around the mandrel in a continuous curved path; and means for applying a curable resin to the filaments.