PROCESS FOR MANUFACTURING CYLINDRICAL SECTIONS FROM TUBES, PREFERABLY OF GLASS, AND A DEVICE FOR PERFORMING THE PROCESS

摘要

The process to which this invention relates is used to manufacture cylindrical sections from tubes, preferably of glass, for use in particular as syringe cylinders. The tubes (2) are first withdrawn from the supply station (3) and are then transferred individually to the processing station (4). There the tubes (2) are held in such a manner that they can be moved axially forward and rotated about their axis, so that cylindrical sections (1) can be sequentially cut from them by means of a laser. After each section (1) is cut off, it is moved axially forward away from the tube (2). The opposing end surfaces of the tube (2) and the section (1) are simultaneously or serially melted to form a bulge or lip. Finally, the sections (1) are conducted by means of guiding devices to the transportation unit (5), which is equipped with receptacles (23) that have low heat-conducting properties, so as to avoid the occurrence of any mechanical stress in the sections (1) as they cool, while the tube (2) is moved forward for removal of the next section (1).