Máquina llenadora latas aerosol

Our aerosol can filling machines accommodate standard aerosol can diameters of 45mm, 52mm, 57mm, 65mm and 73mm, and heights from 80mm to 220mm. This covers the most common commercial can sizes: 100ml (45mm diameter), 150ml (52mm), 200ml (52mm), 300ml (52mm or 57mm), 500ml (65mm) and 750ml (65mm or 73mm). Can changeover uses servo-driven adjustable guide rails and a programmable fill nozzle height. Recipe changeover for a different can size of the same diameter (e.g., 200ml to 300ml in 52mm diameter) takes under 5 minutes — only the fill nozzle height and gassing head height need adjustment, and these are stored as recipe parameters in the HMI.

In UTC (under-the-cup) gassing, the propellant quantity is controlled by a mass flow controller (MFC) or by pressure-timed fill. Our preferred method is pressure-timed fill with a calibrated propellant manifold: the propellant (LPG) is held in a pressure vessel at controlled temperature (25°C ± 1°C in a temperature-controlled propellant room), and the fill valve opens for a precise duration (100–500 milliseconds) timed by the PLC. The propellant manifold pressure and temperature are monitored and displayed on the HMI — any deviation from setpoint triggers an alarm and production pause. Propellant fill accuracy using this method is ±1–2g per can, which translates to ±0.5–1.0% for a 200g propellant charge. For higher accuracy requirements (±0.5g), a Coriolis mass flow meter can be added to the propellant supply line to measure propellant mass flow directly.

The minimum ventilation requirement for an LPG aerosol filling room depends on the production rate and can size (propellant quantity per can). As a baseline, EN 13463-1 and local fire authority guidelines require: (1) mechanical supply and exhaust ventilation with a minimum of 10 air changes per hour (for normal production conditions in a Zone 2 classified room); (2) exhaust ventilation draw point at floor level (since LPG is heavier than air and accumulates at floor level); (3) supply air inlet at high level, exhaust at low level to create a top-to-bottom air flow pattern that sweeps LPG vapors out at floor level; (4) ventilation system on UPS backup power — the ventilation system must continue operating during power failure events; (5) ventilation fan motors and ductwork rated ATEX Zone 2.

LPG quantity in an aerosol product is determined by the product's target pressure, temperature performance requirements and product-to-propellant ratio. The calculation involves: (1) define target can pressure at 50°C — this is the critical safety pressure for aerosol regulations (e.g., EU Aerosol Directive 2016/1101 requires the can internal pressure at 50°C to not exceed 14 bar for steel/aluminum cans); (2) select LPG blend — typical commercial aerosol LPG blends are Propane/Butane 30/70 (vapor pressure approximately 4.5 bar at 20°C, approximately 10 bar at 50°C) or Propane/Butane 20/80 (vapor pressure approximately 3.8 bar at 20°C); (3) calculate propellant fill weight using the P-V-T relationship for the LPG blend in the specific can volume and product quantity. Our engineering team provides propellant calculation support as part of the line commissioning service.