Llenadora semiautomática de bidones

A semi-automatic drum filling machine is a floor-scale based filling station where the operator manually positions each container, and the machine automatically fills to the preset target weight. Operation sequence: operator rolls or carries the empty drum onto the platform scale → the scale reads and stores the tare weight → the fill valve opens automatically (or on foot-pedal trigger) → the machine fills at high flow rate, slowing to dribble near the target → the valve closes at the target net weight → the operator removes the filled drum and positions the next. The "semi-automatic" refers to the manual drum handling — the filling itself (tare, fill, cutoff) is fully automatic. This configuration is preferred for: operations with 50–500 drums/day, mixed container sizes on the same line, lower capital investment vs full automation, and floor layouts that cannot accommodate a conveyor.

Semi-automatic drum fillers using net-weight load cell measurement achieve ±0.2% accuracy (±400g on a 200L drum fill of approximately 200kg). This is suitable for most industrial chemical, lubricant and food liquid applications where fill accuracy needs to meet legal metrology requirements. Accuracy depends on: load cell quality — high-quality load cells with A/D conversion are accurate to 50g resolution on a 300kg scale. Two-speed fill — the machine fills fast (bulk flow) until near the target, then slows (dribble flow) to approach the target weight precisely. Anti-vibration isolation — the floor scale should be isolated from conveyor vibration and operator movement for best accuracy. In-flight correction — the controller calculates in-flight material (material falling from nozzle after valve closes) and applies a deduction. For high-value products or legal trade applications, ±0.1% accuracy systems are available with higher-resolution load cells.

Semi-automatic drum fillers handle a wide range of container sizes on the same machine — this is a key advantage over automatic conveyor lines: small containers (5L–25L pails) — the operator places the pail on the scale, adjusts the nozzle height, and the machine fills. Container change takes less than 2 minutes. Mid-size containers (30L–60L kegs, 10L–20L cans) — same process, adjust nozzle height and preset weight. Standard drums (200L–220L) — most common application. Large drums (250L non-standard) — with appropriate scale capacity (500kg option). Note: IBC totes (1,000L) require a separate IBC filling station due to different nozzle configuration and scale capacity. The ability to switch between container sizes in minutes makes semi-automatic fillers ideal for contract manufacturers, toll fillers and operations with product variety.

Semi-automatic drum fillers handle liquids from water-thin to medium viscosity: low viscosity (1–500 cP): engine oil, diesel additives, water treatment chemicals, food-grade vinegar, cleaning agents — gravity or pump-fed with standard DN25 valve. Medium viscosity (500–5,000 cP): gear oil, transmission fluid, thick syrups, liquid detergent, latex paint — pump-fed with DN32–DN40 valve, possible heated lines. High viscosity (5,000–20,000 cP): heavy gear oil, resin, adhesive, thick coating — heated vessel and lines, DN40–DN50 valve, screw pump. Very high viscosity (>20,000 cP): bitumen, heavy grease, hot-melt adhesive — heated tank, gear pump, insulated heated lines, temperature control system. For flammable products (flash point <60°C), an ATEX Zone 2 certified semi-automatic drum filler is required.

Semi-automatic: operator manually places each drum on the scale, removes each filled drum. Throughput: 3–8 drums/minute. Required operators: 1 (full-time at the filler). Best for: 50–500 drums/day, mixed container sizes, lower capital. Investment: $15,000–$35,000. Fully automatic: drums conveyor-fed, automatically positioned, filled and conveyed away. Throughput: 8–15 drums/minute. Required operators: 1 (line oversight only). Best for: >500 drums/day, uniform container sizes, high throughput priority. Investment: $60,000–$150,000. The break-even point between semi-auto and full-auto is typically around 500–800 drums/day, considering labour cost savings vs capital cost. Many operations start with semi-automatic and upgrade to full-auto as volume grows.

Semi-automatic drum filling machine investment: basic semi-automatic drum filler (foot pedal, floor scale, manual valve, no PLC): $8,000–$15,000 USD. Standard semi-automatic drum filling station (PLC, auto fill, touchscreen, recipe storage, 200L drum, 5–8 drums/min): $15,000–$28,000 USD. Semi-automatic drum filler with ATEX Zone 2 certification: $22,000–$40,000 USD. Semi-automatic pail + drum combined filling station (5L–220L on same scale): $20,000–$35,000 USD. Optional add-ons: bung cap press ($3,000–$8,000), label printer ($2,000–$5,000), batch reporting software ($1,500–$3,000). Contact us with container sizes, product, viscosity, throughput and ATEX requirement for a precise quotation.