| 主权项 |
1. An apparatus for shaping plastics material pre-forms into plastics material containers, comprising:
a blow mould device which forms a cavity inside, the plastics material pre-forms capable of being expanded to form the plastics material containers, wherein the blow mould device has a first blow mould part, a second blow mould part, and a base part, which are movable relative to one another in order to open or to close the blow mould device; a blow mould carrier device for holding the blow mould device, wherein the blow mould carrier device has a first carrier part for holding the first blow mould part and a second carrier part for holding the second blow mould part, wherein the apparatus has a third carrier part for holding the base part, and wherein the apparatus has a centering mechanism in order to center the base part at least for a time with respect to the first and second blow mould parts, wherein the centering mechanism has a first engagement element which is designed in the form of a projection and which is movable with respect to a second engagement element designed in the form of a recess, and one of these engagement elements is arranged on the third carrier part, wherein, the recess and the projection are designed in such a way that during a feed movement the projection engages in the recess, wherein the first and second engagement elements are in contact by way of a first contact face at least for a time during a shaping procedure, wherein the base part is supported by the contact in a longitudinal direction of the plastics material pre-forms, wherein the first and second engagement elements are arranged in such a way that they do not come into contact with each other along the contact face at least for a time during a closing movement of the blow mould device. |
