Nozzle Heaters with clamp-band

Especially for high-cavity PET plastic injection moulding there are various industry standards of clamp-band nozzle heaters available. Most common are the Axial Clamp-Band Heater and the Two-screw Clamp-Band Heater. Our HotCoil cable heaters with clamp band represent a highly demanded and very flexible clamping system, especially for heating larger nozzles and bushings with high power. The size-variable customizable clamp bands counteract the heating's thermal-related "lifting ambition" during heat-up and thus effectively prevent a possible critical overheating. For an even better protection all HotCoil heating elements can also be provided with an integrated thermocouple. As alternative to our standard clamping mechanism with welded clamping elements a space-saving lug clamping mechanism can be supplied.

The Freek heat transfer nozzle heater type especially addresses manufacturers and users who operated their hotrunner nozzles with cast-in heaters in the past and would like to stick to their engineering know-how without paying the high price of this former heater design. The standard material of our patent pending Freek heat transfer alternative is brass, with or without coating, basically with a slit. Characteristics of our HotMicroCoil nozzle heaters sheathed by a reflection tube are easy mounting and variable heat distribution. Because of its direct touch and toleranced fit, the heater allows a very good heat transmission to the nozzle. In all our HotMicroCoils with reflection tube the assembly of a thermocouple is possible and recommended for bigger diameters and power. Also most common nozzle heater solutions are HotMicrocoil heating elements with clamp bands with diverse locking mechanisms.

Besides its own systems Freek also manufactures original Rosemount-systems that can also be used as "Husky-replacement heater" (see spare part cross-reference list). For example the two screw clamp band (FB) and the axial clamp band (FE). Both systems can be supplied with MicroCoils in "Rosemount style" (Ø 1,4 mm) as well as MicroCoils in "Freek style" (1,3 x 2,3 mm).

Advantages of Heating Plates with Square Cartridge Heaters: -> Simple plate manufacture due to rectangular groove geometry, no deep-hole boring -> Simple heater installation by bending and pressing along the plate surface -> Complex plate geometries with bores and openings -> Optimal heat transfer due to 75% surface contact -> No casting with heat conductive compound -> Uniform temperature profiles due to thermally optimized groove layouts/power distribution and utilization of insulation plates -> high process temperatures (up to 450°C in aluminium, up to 700°C in stainless steel) Example "Heated Stamp": D=100 mm out of tempered tool steel up to max. 700°C continuous temperature. Fitted with 2 Square Cartridge Heaters 1500 W/ 230 V, 4,5 x 4,5 mm x 600 mm, with 50 mm unheated at the termination end. Annealed and formable with a nickel sheath, resistant up to 850°C surface temperature. Connection by fibreglass insulated pure nickel high-temperature leads (max. 500°C)