Heater assembly for blow molding plastic preforms

Details Heater assembly for blow molding plastic preforms Heater assembly for blow molding plastic preforms

B - Operations, Transporting

29

C

B29C 35/08 (2006.01) B29C 49/64 (2006.01) B29C 49/68 (2006.01) B29C 49/06 (2006.01)

Patent

CA 2400297

A heater assembly (20) for heating blow molding plastic preforms (14) includes a plurality of elongated heaters (26) mounted by a housing (24) and extending along a path of conveyance of the preforms in a parallel relationship to each other, and each heater includes an elongated parabolic reflector (44) that reflects radiation from an adjacent elongated bulb (36) to irradiate the conveyed preforms. The heater assembly (20) also includes a quartz window (58) located between the elongated heaters (26) and the conveyed preforms (14) to transmit infrared radiation while blocking longer wavelength radiation so as to provide uniform heating of the conveyed preforms.

Un ensemble (20) d'éléments chauffants destinés à chauffer des préformes (14) en plastique de moulage par soufflage comprend une pluralité d'éléments chauffants oblongs (26) montés par un logement (24) et s'étendant le long d'un chemin de transport des préformes en une relation parallèle les uns aux autres, et chaque élément chauffant comprend un réflecteur parabolique oblong (44) réfléchissant le rayonnement provenant d'une ampoule adjacente oblongue (36) afin d'irradier les préformes transportées. L'ensemble (20) d'éléments chauffants comprend également une fenêtre à quartz (58) située entre les éléments chauffants oblongs (26) et les préformes transportées (14) afin de transmettre le rayonnement infrarouge tout en bloquant le rayonnement de longueur d'onde plus longue afin de produire un chauffage uniforme des préformes transportées.

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