HK 214 Heating-cooling assembly for intensive air cooling

Application areas:

Heating/cooling of extruder or injection moulding cylinders with increased cooling requirements.

Construction/version types:

Special ceramic heating-cooling bands of type KH 214 in widths of 30 mm, 48 mm and 63 mm are mounted directly on the cylinder at regular intervals. A fixing template supplied makes alignment of the heater bands in the corresponding cylinder zone much easier.

A housing made of 0,8 mm thick aluminised sheet steel (stainless steel on request) is subsequently fitted and encircles all the heater bands in the zone. Additional fixing brackets are attached to the bottom part of the housing in order to make assembly easier and support the weight of the cooling fan.

The connection flange for the cooling fan in addition to specially-shaped air deflectors for distribution of the cooling air in the axial and tangential directions are also integrated in the bottom half of the housing. The individual design of these air deflectors ensures the best possible even circumfluent flow of the cylinder and therefore counteracts any undesirable bending of the cylinder and corresponding wear.

The spacious electrical connection chamber, which stands out due to its optimum accessibility, is located on the side of the fan flange housing. The glass fibre insulated leads are connected on a ceramic terminal block in this case. An electrical supply cable at a defined length can be connected before delivery. Likewise electrical connection can be made through industrial plugs.

Sensor bores and notches will be taken into account as far as technically possible.  

The size of the air outlet opening in the upper part of the housing is matched to the corresponding flow volume of the intended fan, and is fitted with a grid structure for optimum airflow.

Additional air deflectors can be fitted to the air outlet opening as an option. As an alternative the ecowema® flap system can also be mounted. It helps to prevent heat loss caused by convection.  

The completely removable housing cover, the fixing bracket on the lower shell and the spreadable ceramic heater bands ensure a high level of assembly-friendliness.

Also available in UL/CSA certified version on request.

Technical specification:

Mat. housing: 0,8 mm aluminised sheet steel (stainless steel on request)
Voltage/tie-in: according to specification
Heating capacity: max. 7 W/cm², related to the heater bands
Operating Temperature heating element _max.: 400 °C (special version to 500 °C)
Diameter: from 60 mm
Width: from 100 mm
Wall thickness: 36,5 mm 

Accessories:

Single or double fans.
An ideal supplement for amplifying the cooling capacity is provided by the flexible aluminium KE 300 cooling elements, which can be mounted on the free cylinder surfaces between the heater bands.

Ecowema:

In order to reduce the energy consumption and the thermal dissipation, a 25 mm thick thermal insulation can be integrated in the housing depending on the cylinder diameter.
Alternatively, the flexible ISOWEMA insulation can be used.
In order to prevent convection heat loss, the ecowema® - air flap system can be fitted at a „12 o`clock“ fitting position.

Electrical Test Data

Power tolerance: ± 5%  

Unless otherwise specified, our heating elements are rated IP30.
Special versions with a higher degree of protection can be manufactured upon request.