US 7,491,358 B2 · Method and device for regulating the temperature of parisons

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.

Claims24

Dependent claims

Method for tempering at least one preform of a thermoplastic material which in connection to tempering is molded into a container inside a blow mold by a medium under pressure, comprising:

simultaneously heating the preform by heat radiation from heating elements and cooling the preform by cooling air
measuring the preform surface temperature and comparing the measured surface temperature against a target surface temperature to determine a deviation in surface temperature;
and
compensating for the deviation in surface temperature by varying the intensity of the cool air applied to the preform to obtain a basically constant surface temperature of the preform.

1 more element

Dependencies are inferred from the claim text.

Method and device for regulating the temperature of parisons

Life of this patent

Method and device for regulating the temperature of parisons

Life of this patent

Abstract

Claims24