آلة تعبئة دلاء

A pail filling machine is an industrial filling station designed to accurately fill small-to-medium rigid containers — typically 1L cans up to 25L pails (buckets) in plastic or metal. Pails are the standard consumer and commercial packaging for paints, coatings, lubricants, food products (shortening, honey, condiments) and industrial chemicals. The pail filling machine uses net-weight measurement (load cell) or volumetric measurement (flow meter or piston) to fill each pail to the exact target quantity. After filling, the pail moves to an optional lid press (snap-on lid) or torque capper (screw-top lid). The machine can be semi-automatic (operator places each pail manually) or fully automatic (conveyor-fed, with automatic pail placement and capping). Pail filling is the most common filling application in the paint and coatings industry globally.

Pail filling machines serve a wide range of industries: paints and coatings — architectural paint, industrial coating, primer, varnish, wood stain in 1L–20L pails. This is the largest single market for pail filling machines globally. Lubricants and greases — engine oil in 4L–20L, gear oil, transmission fluid, lithium grease in 1kg–18kg pails. Food products — cooking oil in 18L pails, ghee, shortening, honey, peanut butter, food-grade condiments. Industrial chemicals — cleaning agents, water treatment chemicals, adhesives, textile chemicals in 5L–25L pails. Construction chemicals — tile adhesive, waterproofing membrane, epoxy resin, grout in 5L–25L metal or plastic pails. Agricultural chemicals — liquid pesticides, herbicides, fertilisers in 10L–25L pails. The machine specifications (materials, seal type, ATEX) are selected based on the product chemical properties.

Net-weight pail filling: uses a load cell scale under each pail. The machine measures the actual mass of product filled. Advantages: accurate for products with variable density (paint, thick liquid), compensates for foam in products like detergent, meets legal metrology requirements for products sold by weight. Best for: paint, coatings, heavy chemicals, food products sold by weight. Accuracy: ±0.2–0.3% on 5L–25L pails. Volumetric pail filling: uses a piston pump (fixed stroke) or flow meter (Coriolis or magnetic) to measure a fixed volume of product. Advantages: faster cycle time (no scale settling time), consistent volume per fill. Best for: products sold by volume (lubricants, food oils), products with consistent density and low foam. Accuracy: ±0.5–1% for piston, ±0.2–0.5% for Coriolis. Disadvantage: density variation (temperature-dependent) affects fill mass. Most paint and coating pail filling lines use net-weight to meet retail packaging regulations.

Pail filling machine speed for 5L paint pails: semi-automatic pail filler (operator places and removes each pail, one fill nozzle): 5–10 pails/min. Automatic single-nozzle pail filling machine (conveyor, auto stop, fill, convey): 10–15 pails/min. Automatic 2-nozzle pail filling line: 15–25 pails/min. Automatic 4-nozzle rotary pail filler: 30–60 pails/min. Speed-limiting factors for paint: paint viscosity (architectural paint at 60,000–120,000 cP fills slower than thin chemical at 100 cP); foam — paints foam during filling, requiring anti-foam nozzles and dip fill; scale settling time — net-weight scale needs 0.3–0.5s to stabilise after fill cutoff. For a standard paint filling line producing 5L pails at 1,000 pails/hour (approximately 16 pails/min), a single-nozzle automatic machine is sufficient. Lines producing >3,000 pails/hour (50 pails/min) require multi-nozzle or rotary configurations.

Yes. Pail filling machines are widely used for both paint and chemical pail filling, with different specifications for each: paint pail filling — anti-foam dip fill nozzle (nozzle enters pail and fills from the bottom up to minimise foam), purge system to clean nozzle between pails, PTFE gaskets for solvent resistance, ATEX Zone 2 for solvent-based paints, optional agitator for paste-type coatings. Chemical pail filling — material selection based on chemical compatibility (SUS304 for mild chemicals, SUS316L or PVDF for aggressive chemicals), PTFE or EPDM seals, ATEX Zone 1 for flammable chemicals, drum vent/equaliser port for sealed metal pails. Food-grade pail filling — SUS316L wetted parts, FDA-approved seals, CIP-compatible, temperature-controlled fill for products filled hot (ghee, shortening). The same base machine frame can be adapted for different product categories by changing the fill head, seals and controls.

Pail filling machine investment: semi-automatic pail filler (foot pedal or auto start, floor scale, 5L–25L, 5–10 pails/min): $10,000–$22,000 USD. Automatic single-nozzle pail filling machine with conveyor (10–15 pails/min, 1L–25L): $25,000–$55,000 USD. Automatic pail filling and capping line (conveyor, fill, lid press/capper, 10–20 pails/min): $40,000–$80,000 USD. ATEX Zone 1/2 pail filling line for paint or chemical: $50,000–$120,000 USD. High-speed 2-nozzle or rotary pail filling line (30–60 pails/min): $80,000–$200,000 USD. Complete paint filling line (mixer, filler, capper, labeller, palletiser): $150,000–$500,000 USD. Contact us with pail sizes, product (paint/lubricant/food/chemical), viscosity, target speed and ATEX requirement for a precise quotation.