Patent ID: 8852497
Filing Date: 2014-10-07
Classification: B29B,B29C,B29K

Abstract:
1. A method for providing an internal surface temperature longitudinal profile measurement of a thermoplastic preform during a stretch blow moulding production process, the method comprising: (a) heating a plurality of in-line cold preforms in a production process to provide a plurality of in-line heated preforms; (b) diverting at least one in-line heated preform of the plurality of in-line heated preforms to provide at least one off-line heated preform; (c) providing the remaining in-line heated preforms to one or more stretch blow moulds for forming the remaining in-line heated preforms into blow moulded products; and (d) locating one or more temperature sensors inside the at least one off-line heated preform to measure the internal surface temperature longitudinal profile of said at least one off-line heated preform; (e) controlling the heating of the plurality of in-line cold preforms based on at least the internal surface temperature longitudinal profile; wherein the heating is provided by at least one of a heater and a cooler; and wherein the heating comprises controlling at least one of a location and an intensity of at least one of the heater and the cooler based on at least the internal surface temperature longitudinal profile.