Method and device for cooling of IR emitters for preforms

A heating device for warming preforms before processing the preforms in a stretch blow or blow molding device, the performs including a mouth region and a longitudinal axis, the heating device comprising:

• a heating alley with a conveyor for movement of the preforms along a transport route, IR emitters being arranged on at least one side of the transport route, at least one back reflector being arranged on a side of the IR emitters facing away from the preforms, and
• at least one cooler for the IR emitters, the cooler creating a substantially first coolant flow to cool the mouth region of the performs and a substantially vertical second coolant flow that passes substantially vertically between the IR emitters and the at least one back reflector, the second coolant flow being at least partially feedable by the first coolant flow and/or is unitable with the first coolant flow.

A cooling device for cooling of emitters for use in a heating device for warming preforms before processing them in a stretch blow or blow molding device, the heating device comprising a heating alley with a conveyer for movement of the preforms along a trans-port route, IR emitters being arranged on at least one side of the transport route, at least one back reflector being arranged on a side of the IR emitters facing away from the preforms, the preforms to be warmed in the heating device including a mouth region and a longitudinal axis, the cooler comprising:

• at least one cooler for cooling the IR emitters producing a substantially horizontal first coolant flow to cool the mouth region of the preforms and producing a second coolant flow located between the IR emitters and the at least one back reflector, the second coolant flow is at least partially feedable by the first coolant flow and/or is unitable with the first coolant flow.