A method for production control during the stretching blowing process of plastic containers, and test preform

摘要

The invention relates to a method for the production control during the stretching blowing process of plastic containers, in a blow machine, a test preform for use with the method according to the invention as well as a blowing machine for carrying out the method according to the invention. According to the invention, at least one with a regular, in particular equidistant test pattern printed test in a preform into the blowing machine incoming stream of product preforms introduced. Furthermore, the product preforms and the test preform in the continuous operation of the blowing machine to product containers and to a test container and the test container is imaged with at least one camera. As a result, the product quality during the running of the test mode on the basis of the imaged test container carried out in a flexible and selectively.