| 摘要 |
The invention relates to a method for cutting a section of glass tube (101) to length, wherein along a circumferential line (103) of a glass tube (100) a stress zone (106) is produced by heating, said stress zone being located between the section of glass tube to be cut to length (101) and the glass tube (100) and subsequently at least the stress zone (106) is cooled, so that a separating crack (102) is formed in the stress zone (106). The invention further relates to a device (1) for cutting a section of glass tube (101) to length. In order to enable neat cutting to length of glass tubes (100), in particular in the production of pharmaceutical product packaging for the pharmaceutical industry, according to the invention a radial depth of penetration (d106) of the stress zone (106) is less than the wall thickness of the glass tube (d), so that the separating crack (102) forms a predetermined breaking point extending along the circumferential line (103) for cutting the section of glass tube (101) to length. |
