Cooling device for a blow extruder

Details Cooling device for a blow extruder Cooling device for a blow extruder

1991-10-21

1993-06-15

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

622591, 425143, B29C 4786

Patent

active

052195813

ABSTRACT:
A blow extruder for producing hoses made of plastic material has, at the outlet of its nozzle arrangement for producing hoses, a cooling air nozzle ring which encompasses hoses exiting from the nozzle arrangement and to which air is delivered from a blower. An apparatus for cooling air delivered to the cooling air nozzle ring includes a direct evaporator provided with a refrigeration plant and arranged between the blower and the cooling air nozzle ring. The direct evaporator includes a plate fin element and an injection device for a cooling agent and hot air. The cooling apparatus further includes a regulation device for controlling the temperature of the cooling air by controlling operation of the cooling apparatus.

REFERENCES:
patent: 3847516 (1974-11-01), Hoffman
patent: 4022558 (1977-05-01), Herrington
patent: 4115047 (1978-09-01), Stelmack
patent: 4373273 (1983-02-01), Church
patent: 4447387 (1984-05-01), Blakeslee, III et al.
patent: 4606879 (1986-08-01), Cerisano
patent: 4626397 (1986-12-01), Bose
patent: 4938903 (1990-07-01), Schaeffer et al.

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