KH 214 Heating-cooling Band, Special Ceramic, for intensive Air Cooling
2 - 3 weeks
Application areas:
Heating and intensive cooling of extruder cylinders.
Intensive cylinder cooling enables a considerable reduction
of the melt temperature whereby material degradation
due to temperatures being too high is avoided, melt
stiffness at the tool outlet is increased and the cooling
requirements for downstream equipment can be reduced.
This makes higher throughput performances and better
product qualities possible.
Construction/version types:
- Heating conductor coils fitted in special ceramic stones with temperature-resistant braid connection.
- Cooling fins formed on the rear for increasing the heat exchange surface which the cooling air flows past. This results in a 2.5-fold increase of cooling surface related to the stone bearing surface on the cylinder.
- The contact surface of the stone to the cylinder is shaped so that two contact lines for improved heat transmission resultat any cylinder diameter.
- The ceramic stones consist of a special oxide ceramic with a high thermal conductivity of 16-28 W/mK (standard ceramic heater band: 2-3 W/mK) therefore enable a considerably higher heat dissipation than conventional versions.
- A completely flexible heater band can be produced using the concave and convex-shaped end surfaces of the special ceramic stones, and this can be simply placed around the cylinder and is therefore extremely quick to fit.
- Fixing is made using two stainless steel tensioning ropes with clamping screw and compression springs. The system enables high clamping forces, and therefore guarantees a permanently positive contact, and therefore ensures optimum heat transfer.
- The special ceramic stones have an extremely high fracture strength, which ensures a long heater band service life. This makes frequent assembly and disassembly possible without problems.
- The special ceramic heater bands are extremely suitable for use under high cylinder temperatures (e.g. during the processing of fluorine polymers with a processing temperature of more than 400 °C).
- Oxidisation cannot occur due to the complete lack of additional cooling sheets (radiators) made of brass or copper.
- If the heater band width is 48 or 63 mm, centrally located sensor bores are possible.
- Considerably lower energy consumption than in systems in which the heating resistor is pressed or cast in aluminium.
- Simple, modular setup enables short delivery times.
- UL / CSA-certified execution available
Technical specification:
- Voltage: in acc. w. specification
- Heating capacity: max. 7 W/cm²
- Height: 21 mm, incl. cooling fin
- Available widths: 30 mm, 48 mm, 63 mm
- Diameter: from 60 mm
