Patent ID: 6514448
Filing Date: 2003-02-04
Classification: B29C,B29K

Abstract:
A process for tempering preforms made of a thermoplastic material, where the preforms are intended to be blow-molded into containers and where the preform is provided with a temperature profile along a circumference, which is generated by differentially heating strip-shaped portions, which extend in the direction of a longitudinal axis of the preform, and where a step-by-step tempering for the purpose of temporally sequential thermal conditioning of different regions of the preform is implemented, and where step-by-step rotation with a motion phase and a rest phase is carried out as well, characterized in that the preform is transported by a carrier device (19) through a tempering zone, that the carrier device (19) is given a rotational movement by the engagement of gear (25) with matching gear (26) for initiating rotational movements, and that the preform is moved at least along a portion of a transport path prior to the engagement of gear (25) with matching gear (26) and at least along a further part of the transport path after the termination of the engagement of the gear (25) with the matching gear (26) and that it is moved through the tempering zone without movement with respect to the rotational direction.