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Electroheat - machines and equipment - Import export

Germany

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Besides their own clamp-band designs Freek also manufactures original Rosemount clamp-bands that can be used as "Husky-replacement heaters" (see spare part cross-reference list). For example the two screw clamp band (FB) and the axial clamp band (FE). Freek has all the various industry standards for clamp-band nozzle heaters in Ø19,05 and Ø22,40 in their assortment, too. HotCoil minitubular heaters with clamp band are 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.

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Germany

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We can offer flexible heating elements manufactured from three different insulation materials: silicone, polyimide (Kapton) or polyester. Each of these materials possess different properties which make them suitable for diverse applications. Silicone heaters can also be produced in very large sizes, whereas polyimide is significantly thinner and polyester unbeatable in price when it comes to high quantities. All three of them are bespoke products made according to your needs, so within the bounds of what is technically feasible you as the customer can determine almost every feature of your heater. This can include; voltage, wattage, dimensions, shape, sensors, leads, plus much more. Due to their low thermal mass flexible polymer insulated heaters distinguish themselves by a very short response time and excellent controllability.

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Germany

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Spare Heaters suitable for hotrunner nozzles of familiar OEMs: Clamp Band Heaters for Husky Art-No. 520156, 521334, 534192, 534445, 534233, 534234 Kappa heaters for Husky 1250 series,(Bi-Metal, Bi-Metal with TC, Ultra 1250) for Husky 750 series (Bi-Metal, Bi-Metal HTR S/A, Ultra 750) for Husky 500 series (Ultra 500, Copper Ultra 500) Reflection tube nozzle heaers for Husky 500 series (500 HTM Brass) for Mastip MX series (MX13, MX16, MX19) for Mastip DX/MJ series (DX09, MJ09) for Mastip

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Germany

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Thermo Sensors are needed in any controlled heating process. For various applications different types of thermocouples are obtainable. Most common are thermocouples (TC) and resistance sensors (RS). Both types are available in the same executions as a matter of princible. For non-contact measuring infrared sensors are the rights choice, either in stationary executions or as portable measuring instrument.

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Germany

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Open wire heating elements are the best solution for air heating when used in fans. Because of our longlasting experience in this field, we can offer you a series construction in most cases. To use our open wire or coil heating elements in air, the installation of a cut-out is necessary (heat accumulation). The connection is done by a plug at the element (Faston 4,8 or 6,3) or by a cord set. Our extended range of air heater variants comprises: -> Heaters for Laundry Dryers (series & spare parts types) -> Heaters for Cross Flow Fan -> Heaters for Powerful Radial Blowers -> Heating Crosses & Special Designs Various special designs for airflow heating, deploying heater spirals on insulating mica support, are available. They are required when the available space for installation is limited and defined geometrical air ducts do not exist. All special open wire heaters are individual designs, i.e. custom-made.

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Germany

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Heating bands are the ideal solution for the heating of tubes an cylinders. Mica band heaters, frequently used as nozzle heaters, are made with a plastic-tight stainless steel casing. Such mica heating bands are in many dimension available from stock. The Ceramic heating band type is suitable specially for applications with high watt density and therefore for higher temperatures. Ceramic band heaters, also known as ceramic ring heaters or cylindrical ceramic sectional heaters, are attached to the contact surface by means of a clamping mechanism. A preferred field of use for ceramic band heaters is the heating of plasticising cylinders, bushings and nozzles of injection moulding machines and screw barrels of extrusion machines. For thermal optimization and process control ceramic band heaters can also be offered with insulation jackets or air cooling.

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Germany

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Micanite is a kind of insulation paper which is impregnated with a heat resistant binder and afterwards pressed in several shifts under heat and high pressure to plates. This material is heat resistant up to 350 °C, as special construction (Phlogopit) up to 450 °C, and is used for the wire wound formers as well as for the encapsulating cover plates of mica surface heaters. Because of the typical "sandwich"-construction of Micanite Flat Heating Elements and their high watt density it is necessary to use a platen to press the mica heater onto the surface to be heated. Established on the market for round Flat Heating Elements are some standard dimensions (Ø 58 / Ø 65 / Ø 80 / Ø 100 / Ø 160 / Ø 260 mm). But normally Micanite Surface Heating Elements are constructed on customer's request. Mica heaters can be metal sheathed for higher mechanical stability. This makes the heater flexible, so that it is also possible to build a band heater.

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Germany

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Ceramic Insulated (Band) Heaters are predestined for high-temperature applications beyond 450 °C, for example for pipe heating in process heat technology, especially when gases are involved. Ceramic insulated sectional surface heating elements are also brought into action where a heat storage capacity is needed, as in hot plates the case. With the heating surface of ceramic flat heaters being composed by small-limbed ceramic elements with aligned holes in the centre for the resistance coils to be fed through, ceramic sectional heating mats are also applicable for bent or cylindric surfaces. Like Micanite insulated flat heating elements also Ceramic insulated elements can receive a metal sheath. The latter provides additional protection against mechanical load and allows for attaching connection boxes. Another advantage is the easy installation by means of mounting holes in the metal cladding.

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Germany

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Silicone heaters and Kapton heaters are preferred surface heating elements for laboratory equipment and medical technology due to their easy handling and variety of shapes. Like Kapton polyimide heating foils, silicone heaters are resistant to continuous temperatures of up to 200 °C, with self-adhesive foil up to 180 °C. When designing silicone heaters and Kapton foil heaters, the designer has almost unlimited degrees of freedom. This applies to the minimum and maximum dimensions, which are set within wide limits, as well as to contours and recesses, holes and feed-throughs of any kind. The good shape flexibility of silicone heating mats and foils as well as Kapton polyimide heaters also enables the heating of cylindrical, conical or rounded surfaces. The resistance of polyimides to fungi, bacteria, ozone, weather, ageing and most chemicals, acids and solvents is very good, making polyimide (Kapton) heaters an ideal solution for many critical applications.

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Germany

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We offer an extensive range of drum and barrel heaters and container heaters: Heating jackets, silicone drum heaters, base drum heaters and insulating but unheated drum jackets and lids for heating and insulating plastic and metal drums respectively containers. According to the destined application we use polyester, silicone, teflon and glass fibre for our drum heaters and container heaters. Some of the materials are coated and multi-layered resp. combined. Our drum heaters can be used individually and in combination and can be ordered and delivered online (shop.freek.de) for all standard drum sizes (25 / 50 / 105 / 200 litres). Of course, we also manufacture our heating jackets, heating sleeves, base heaters and insulating bonnets individually to fit your container and your special application. HC - Heating cabinets If you heat several drums or containers together or need a container heater for the ATEX area, the heating cabinets from our partner Amarc are the right choice.

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Germany

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Flexible Polyester Heaters consist of a conductive ink between two insulation layers of polyester. The heater can be pressed on or fixed with a self-adhesive foil. Wrapped in PVC the use in liquids is possible as well. Typical standard applications are e.g. mirror heaters, water bed heaters, or low temperature room heaters. For terrarium and aquarium heaters we offer standard elements as well.

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Germany

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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).

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Germany

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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.

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Germany

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In linguistic usage occasionally the terms coil heaters, nozzle heating elements, hot runner heating elements, cable nozzle heaters are used. Our HotMicroCoil heating elements can be used in a wide variety of applications. Their high level of plasticity ideally suits them to the heating of hot runner nozzles and for accurately heating the contours of three-dimensional surfaces. Many of our customers order HotMicroCoil elements in their unformed state of mineral insualted cable heaters and perform the subsequent shaping work themselves, while others commission us to shape and fit the heating cable elements. A large number of ready-to-fit heating solutions are available for plastic injection nozzles with clamping mechanisms, housing bezel, reflection tube or heat conduction sleeve.

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Germany

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The Nomex heating band is an inexpensive solution for applications where a flexible heating element with low power (max. 1 W/cm²) and for max. temperatures of 150 °C is required. A well-established application is it's utilization as standstill heater to prevent condensation and frost damage when motors stand idle in cold environments. Standstill heaters reliably keep motors or electrical machines above the dew point and ensure safe operation even in harsh ambient conditions. The minimum width of the heating element is 12 mm with a maximum length of 1000 mm, bending radii of at least 15 mm are possible.

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Germany

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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)

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Germany

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Preformed silicone heaters are useful for diamters as small as 12 mm and up to 100 mm. Rounded silicone heaters are not possible with self-adhesive foil. Spiral Wrap Pre-Formed Silicone Rubber Heaters are suitable for tubes and flexible pipes and hoses with Ø 6,35 mm (1/4"). Spiral formed flex heaters can be used up to Ø 12 mm (the length of the stretchable silicone spiral wrap heater is reduced accordingly). The thickness of our spiral-wrapped silicone strip heaters is 2,2 mm. Also our gas and pump line heaters, most frequently used in the semi-conductor process, are shaped and pre-formed according to the object geometry to be heated. They are designed to regulate temperatures in order to prevent condensation in the line. Current applications here are Semi Conductors, Vacuum Chambers, Wafer Chucks, Valves, Exhaust & Pump Systems.

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Germany

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Our Locking System provides a quick, easy and reliable clamping of the heating element on the nozzle to be heated. It facilitates an effective heat transfer, as the inside sheath is pressed to the nozzle with a high level of precision creating an interference fit. Due to the method of construction of the lock, installation is possible in the restrictive space of small cavities. The lock can be operated quickly and efficiently with simple readily available tools.

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Germany

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Occasionally also these terms are used for cartridge heates: heating cartridge, insertion heaters, spiral cartridge heaters. As a rule cartridge heaters consist of a cylindrical stainless steel tube and thus provide a high corrosion prevention. There is a heating wire inside which is wound onto a ceramic core. The number of coils varies depending on the power. In order to avoid a short-circuit, the cartridge heater is filled with magnesium oxide and compressed afterwards. Highly compacted they reach a surface watt density of up to 50 W/cm² and withstand highest stress. In the plastics industry cartridge heaters are used in hot runners in order to temper thermoplasts during injection moulding processes. Other areas of applications for process heat are e. g. packaging, diecasting or continuous casting in which zinc or aluminium are processed. Further applications are to be found in mechanical as well as medical and laboratory engineering.

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Germany

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Square cartridge heaters are used where much power has to be installed near the surface of a tool, e.g. in cutting knives, sealing stations or hot plates. With a soft, malleable condition in stainless steel or nickel sheath square cartridge heaters can easily be pressed into common milled rectangular grooves. Apart from the advantageous heat transfer over ¾ of the sheath, it is not necessary to cement or cast in the heater which is imperative for round cartridge heaters. Unlike tubular heaters which are also available in square sections (see chapter Flexible Heating Pipes), the square cartridge heaters have the termination on one side and can be loaded with 16W/cm² (2.5W/in²) due to their special inside construction.

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Germany

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Flexible silicone heaters are resistant to permanent temperatures up to 200°C, with self-adhesive foil 180°C should not be exceeded. Higher temperatures of 230°C are possible for a short time without destroying the heater. The temperature that will be reached within the application, generally is not easy to predict, as there are many influencing factors. In addition to the power, resp. surface load, this also includes mass and type of the material to be heated (thermal conductivity, surface quality, etc.) installation / assembly situation (bonded, vulcanised, clamped, etc.), ambient temperature, air movement and, of course, the control technology used. Application examples for silicone heater mats include: canteen kitchen technology / catering, anti-fog and anti-freeze applications, tool or plate heating in machines, 3D printers, laboratory equipment, composite materials repair, joint curing and much more.

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Germany

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In general, a Kapton film heater is always more expensive than a silicone heater or polyester heater. Where chemical resistance or the weight of the flexible heating element plays an important role, however, Kapton heaters are the ideal solution. The resistance of Kapton Polyimide to fungi, bacteria, ozone, weather, ageing and most chemicals, acids and solvents is very good, so that heating elements made of Polyimide (Kapton) are an ideal solution for many critical applications. Kapton foil heaters are also silicone-free and are characterised by an even heat distribution. The dielectric strength of a Polyimide film is very high and so the flexible Kapton (Polyimide) heater can be very thin. Due to the small thickness, the heat transfer to the component is improved and higher surface loads are possible. Typical applications for Kapton film heaters are: Laboratory technology, aircraft electronics, printers, diagnostic instruments, vacuum chambers, medical equipment and many more.

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Germany

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Polyester heaters also referred to as Polyester film heaters or Polyester foil heaters consist of an electrically conductive ink between two insulating respectively carrier layers of polyester. With a maximum size of 600 x 1000 mm, their average height is only 0.2 mm. As the picture examples show, practically any shape and type of cut-out is possible. Polyester foil heaters are resistant to permanent temperatures of up to 90°C (max. 100°C for short periods). It is generally not possible to predict which temperature a Polyester heating element will reach in the application, as there are extremely many influencing factors. These include not only the power, but also the mass and type of goods to be heated, the ambient temperature, air currents, the type of mounting and, of course, the control technology. Typical applications for Polyester heaters are e.g. cup warmers in coffee machines, mirror heaters, plate heat exchangers, flat applications with a target temperature below 90°C.

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Germany

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There are three main types of infrared emitters. They are classified according to emitted wave lengths. Which emitter type is the best for your application depends on many factors. For most applications an optimum match of emitted wave length and absorption of the target material is desirable. This means a highly efficient transfer of radiation energy in the material and thus a very quick heating. However, there are exceptions to the rule. At very high required energy densities, cyclical processes, transparent, thin or low-conductive materials it might be necessary under certain circumstances to deliberately use emitters whose characteristics deviate radically from the absorption characteristics of the material to be processed. Finally, in many applications, including thermoforming, all three basic emitter types are successfully used – long wave ceramic emitters, medium wave quartz emitters and short wave halogen emitters.

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Germany

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The HSSD - Side Drum Heater is an easy and actual aid to the warming of steel barrels. It has got a higher efficiency than the Insulated Jacket HISD, but no thermal insulating function. For a very quick heating and higher temperatures up to three drum heaters can be used simultaneously for a 200-liter barrel. The Side Drum Heater is available in four standard sizes (25 / 50 / 105 / 200 liters) and can of course be made to measure, too. HSSD - Side Drum Heaters are suitable in particular to defrost frozen or other products, thus allowing to empty the barrels rapidly. Soaps, fats, varnishes and oily products can be melted as well, respectively reduced in their viscosity. In addition, the 200-liter element can be used in conjunction with the HBD Base Drum Heater to shorten the heating-up time further.

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Germany

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The HISDpro - Side Drum Heater is a simple yet effective silicone insulated drum heater for the heating of barrels up to 90°C. The Silicone heating jacket is available in four standard sizes (25 / 50 / 105 / 200 liters) and can be manufactured to customer specifications as well. HISDpro heater jackets are particularly suited to melt soaps, fats, varnishes and oil-based products, or respectively reduce their viscosity. The 200-liter element can be combined with the HBD - base drum heater to reduce the heat-up time. These heater jackets are not only used on drums but also containers and any kind of glass-fibre reinforced plastics. They can be produced with any number of belts, e.g. to enable them to be clamped on to rotor blades.

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Germany

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The HSHP – Drum Heater (220 °C) is suitable for steel drums (and with restrictions also for plastic drums). The outer material is a Teflon which is released for contact with food. The material possesses high levels of chemical and acid resistance. However, products such as waxes, soaps and materials with high water content can be heated excellently as well. The drum heating jacket is lightweight, robust and free of silicone. The excellent thermal transfer properties due to the perfect fit result in homogenous temperatures. Our silicone-free high-temperature drum heater is available in the standard size of 200 liters but can also be made to customer specification.

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Germany

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The HTSD-High Temperature Drum Heater is our high temperature drum heater (220 °C) and exclusively suitable for steel drums. The heating jacket is used in areas where large surfaces need heating over 90 °C. This barrel heater is available in four standard sizes (25 / 50 / 105 / 200 liters) and can be manufactured to customer specifications as well. HISD heater jackets are particularly suited to melt soaps, fats, varnishes and oil-based products, or respectively reduce their viscosity. The 200-liter element can be combined with the HBD - base drum heater to reduce the heat-up time. The heating element of the HTSD heating jackets is sewn into a fleece made of silicone-insulated fibreglass material. The insulating outer housing consists of a binder-free mat made of textile glass. The heating element is therefore double insulated (protection class II). An optimal contact with the barrel, as well as a quick assembly and dismantling are achieved by the use of quick release buckles.

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Germany

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The IBC/Bpro-Container Jacket Heater is an insulated heater jacket for the heating of bottle-in-a-cage containers. All four sides of the container are covered by the heater. The container heater has two separate heating circuits (top and bottom), allowing for an economical heating of half-filled containers, too. The HILC unheated insulated lid can be used in addition to shorten the heat-up time. The IBC/B heating jacket can also be combined with the IBC/A container base heater. It's a silicone heater mat that is placed below the plastic container before that is filled.

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