Method and device for regulating the temperature of parisons

Details Method and device for regulating the temperature of parisons Method and device for regulating the temperature of parisons

2002-03-12

2009-02-17

McDowell, Suzanne E. (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Direct application of fluid pressure

C264S458000, C264S040100, C264S040600, C264S535000, C425S143000, C425S174400, C425S526000, C425S534000

Reexamination Certificate

active

07491358

ABSTRACT:
A method and device serve the tempering preforms of a thermoplastic material. The preforms are modeled subsequent to tempering into a container inside a blow-molding mold by the action of a medium under pressure. During tempering, the preforms are heated by being acted upon by a heat radiation as well as cooled by being blown upon with cooling air, at least in the surface region. For compensation of a change in the surface temperature of the preforms due to operating ambient parameters, a change in the intensity in the subjecting of the preforms to cooling air is conducted. This takes place such that with simultaneous heating and cooling a basically constant surface temperature of the preform is attained. In addition, the intensity of heat radiation can be regulated for adaptation to at least one operating parameter.

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