PLASTICS
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Zoppas Industries Heating Element Technologies

CERAMIC BAND HEATERS These heaters are made up of a spiral in NiCr 80/20 or FeCrAl alloy inserted in steatite modular elements, while the outer casing is made of sheet Alusi or, upon request, stainless steel. Thanks to the thermal transmission mode by irradiation, ceramic bands are the optimal heating solution for high power installations and can reach up to 450° C measured temperature on ceramic/cylinder contact surfaces. The glass fibre insulation that wraps the ceramic mat has the dual function of limiting the temperature of the outer casing, and conveying the flow of heat to the surface...

MICA BAND HEATERS CAST-IN ALUMINIUM TUBULAR HEATER FOR HEATING/COOLING Consisting of an NiCr plate wrapped and insulated from appropriate supports in mica. The outer casing, usually made of sheet Alusi, is also made of stainless steel on request. Compared to ceramic band heaters, those with mica insulation work by conduction, maximising their efficiency and reliability at temperatures up to 350° C, measured on mica/cylinder contact surfaces and with specific loads up to 4W/cm². The manufacturing technology with which they are produced and the quality of the materials used make these heaters...

COMPLETE SYSTEMS FOR HEATING AND FORCED AIR COOLING Known as Ultrawatt, high density cartridges are characterised by extreme versatility and precision of the thermal profile combined with high performance. in that they can reach temperatures up to 750° C or specific loads in the order of 40 W/cm2. The most common construction is with a straight, or 90° exit, and metal sheath to protect the cables at high temperatures. The sheath material used is mainly AISI 321, but, on specific customer request or according to particular temperature regimes, other steel alloys are also used. They are...

MICA NOZZLE BANDS MI NOZZLES These are special mica bands made of stainless steel. The firmly welded cover with which they are equipped makes them particularly well suited to heating the press nozzles, ensuring their protection against pollution by material; typical problems of the injection head. Operating limit temperature is 350° C standard, with specific loads of around 6W/cm². On request and under certain working conditions, versions can be made for higher temperatures, up to a ceiling of 450° C. Customisations can also include the use of integrated thermocouples and accessories such...

BANDS FOR REDUCED-FOOTPRINT NOZZLE These are mica bands, generally made of sheet Alusi, and protected with a steel belt guard, the wires of which exit axially from the heater thickness. Their small size allows these bands to be ideally suited to moulds and hot runners. Maximum operating temperature proven at 350° C, with specific loads of around 6W/cm². Power is supplied using two single-pole cables which are armoured against high temperatures. The construction standard is shown in this drawing: Zoppas Industries Heating Element Technologies, through the use of continually innovative...

CARTRIDGES High density cartridges, known as Ultrawatt, are characterised by extreme versatility and precision of the thermal profile combined with high performance. In that they can reach temperatures of around 750° C or specific loads in the order of 40 W/cm2. Thanks to these features the cartridges are widely used in mould heating or flat extrusion heads. Uses multiple cartridge heaters connected in series of greatest cartridge resistance, when addressing specific dimensional needs such as being unable to employ additional power cables or temperature control sensors. The uniqueness of...

MICROTUBULAR HEATERS TUBULAR HEATING ELEMENTS They are heaters made up of a metallic steel sheath containing a resistive NiCr 80/20 filament, insulated with high purity compacted magnesium oxide. This structure ensures durable high performance, power density and operating temperature. Thanks to these characteristics and reduced overall dimensions they are particularly suitable for heating of hot runner nozzles. Form customisations are possible (straight or coiled) and those of isolated Thermocouple type ("J", Fe CuNi, or "K", NiCr Ni). To ensure good electrical insulation, sealing is...

TUBULAR HEATERS ON FLANGE These are primarily used for dehumidification or drying of polymer grains and for heating water or oil in the temperature registers. They are made primarily with smooth tubular elements, brazed or welded on flanges in stainless steel of different sizes and shapes depending on the customer's requirements. They are equipped with a sump for the use of a control thermostat. The available electrical connections are: • Faston • Nutplates • Threaded connectors • Cables • Bridges These are fixed to the terminal pins using electrical welds. If however the pins are threaded,...

CARTRIDGE HEATERS ETCHED FOIL PTC self-regulating cartridges are used in conjunction with a aluminium finned heatsink inside electrical panels in order to prevent the formation of condensation. The flexible foil heating elements in silicone are applied using doublesided adhesive, with which they are equipped, to the internal walls of cabinets and electrical boards, in order to avoid the formation of condensation. The anti-condensation heater has been developed to maintain a constant temperature inside closets, cabinets and enclosures for electrical equipment, in order to remove condensate...

DUCT HEATERS WITH SMOOTH AND FINNED ELEMENTS Electric duct heaters are used for drying and/or dehumidifying granular plastic material and are divided into two families: • With smooth elements • With finned elements AIR HEATERS They are used for dehumidification or drying of plastic polymers before processing. The main characteristic of these products is their remarkable compactness and versatility, as they can be connected to tubing using the threaded fittings at the ends where these are present. With smooth elements: They are designed to ensure low pressure loss, have stainless steel...