plastbobin with cylinder and runtomgu00e5ende, in one piece, thus designed u00e4ndflu00e4nsar, as well as the way to produce such a

摘要

A bobbin ( 1 ) of plastic has a cylinder ( 2 ) and, formed integrally therewith, circumferential end flanges ( 3 ) and is made of a U-shaped channel. Each end flange ( 3 ) consists of a plurality of spaced-apart, essentially radial flange elements ( 4 ) which are distributed along the circumference of the cylinder ( 2 ). In a method of manufacturing such a bobbin, a U-shaped channel is made by injection moulding. The U shaped channel is given such a shape that its side walls consist of a plurality of spaced-apart wall elements which are distributed along the length of the channel. The channel is bent to form the cylinder ( 2 ) and its ends are connected with each other in this bent position.