The right cartridge heater parameters for moulds and packaging machines.
Cartridge heaters heat metal moulds and are used in plastics processing and packaging machines. They are not stock items — each one is made to the customer's specification. When ordering, specify the following precisely.
1. Diameter
The heater must fit the bore tightly — a gap reduces heat transfer and shortens service life. Catalogue metric diameters: 2, 3, 4, 5, 6, 6.5, 8, 10, 12, 12.5, 16, 20 mm; inch diameters: 1/8–3/4″ (tables up to 1 1/4″). The actual diameter is slightly below nominal, e.g. 9.90 ±0.05 mm for 10 mm. Details: metric diameter table and inch diameter table.
2. Length and unheated zones
Maximum straight length is 3000 mm with ±1.5 mm tolerance. There is a 3–20 mm unheated zone at the lead end and 3–9 mm at the bottom — allow for this in the mould design.
3. Voltage and wattage
Standard voltage is 230 V; others on request. Current and wattage are limited per diameter: e.g. max. 1050 W at 240 V for 6 mm and 5520 W for 16 mm. Wattage tolerance is +5% / −10%.
4. Lead wires
- F10 — straight fibreglass lead;
- F11 — high-temperature film-insulated lead;
- F12 — swaged silicone-insulated lead;
- F13 — swaged Teflon-insulated lead.
Standard lead length is 300 mm, rated for continuous 250°C. Metal braid or hose can be added for protection.
5. Options
Variants: right-angle or twisted leads, threaded/flanged fittings, built-in J/K thermocouple, Ø2–4 mm micro version.
Sample order
“Cartridge heater Ø10 mm, length 120 mm, 230 V, 400 W, F12 lead 500 mm, metal braid, built-in type K thermocouple — 20 pcs.”
Send a photo of the old element or a drawing — Afitin Group will select the heater and prepare an offer. Other types: tubular, flange and finned heaters, mica, Teflon and hot runner heaters. Specifications are for information only and are confirmed for each specific order.