Cast-in Heaters for the packaging industry

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Cast heaters with cast-in tubular heating elements have been manufactured by our partner company Amarc srl near Milan for over 20 years. Freek has been producing electric heating elements for over 70 years and has a large customer base in the plastics and packaging industry. Through the close cooperation of Freek & Amarc, you as a customer benefit from our many years of experience in the design of industrial heating solutions and, in particular, in the casting and CNC-supported manufacture of heating plates and heating tools.

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The cast heating plates and tools are heated with tubular heating elements cast in aluminium or bronze. Cast bronze heaters are used when cast aluminium heaters reach their mechanical and thermal load limits.

In principle, there are two possible uses for cast heaters:

1. as universal heating insert
2. as direct heating system

In the direct heating version, the heater is the tool itself. Cast heating tools with cast-in tubular heating elements are often provided with Teflon or higher temperature resistant non-stick coatings to protect the hot tool contact surface from material contamination.

In the heating insert version, the cast heating plate transfers the generated heat indirectly to the mould. In this way, cast heating elements can be standardised even with a high variety of mould variants and thus produced in more economical quantities.

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Our cast heaters with cast-in tubular heating elements are primarily used in machines and systems in 24/7 operation, e.g. in food packaging machines, pharmaceutical packaging machines, thermoforming machines, filling lines or flow-packaging machines. The indirectly or directly heated tools are e.g. embossing dies, sealing plates, sealing bars or thermoforming profiles.

For these applications and moulds, it's all about perfect temperature homogeneity, short cycle times and high machine availability. This is precisely where direct or indirect mould heating has its strengths, which is why the heating solution with cast-in tubular heaters is so widespread in packaging machines.

The advantages of electric cast-in heaters:

• High durability, reliability, efficiency, and safety
• Surfaces ground flat, non-stick coated, protected against abrasion
• Short response time and very good heat exchange capacity
• Even heat distribution over the contact surface (+/- 3°C)
• Operating temperatures up to 350°C (aluminium heater plates), up to 600°C (bronze heater plates)
• Termination design according to protection class IP55 or IP65
• Operating voltage 110 V to 500 V / power up to 13 kW
• up to 1500 mm x 450 mm with minimum panel thickness of 20 mm
• High design freedom
• Simple connection/wiring
• 3-year warranty



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