Máquina llenadora de latas de aceite comestible

HEMU edible oil tin filling machines are designed for cans from 1L to 20L. Common configurations: (1) 1L–5L round tin cans (standard retail cooking oil format in Middle East and African markets); (2) 4L–10L rectangular tin cans (common format for cooking oil in North Africa and the Levant); (3) 16L–20L large rectangular tin cans (bulk catering and foodservice format). The machine adjusts to different can diameters and heights via guide rail adjustment and fill head height adjustment. Changeover between different can sizes in the same diameter family takes 20–40 minutes. Changeover between significantly different can sizes (e.g., 1L round to 18L rectangular) requires a full format change taking approximately 2 hours.

Double-seam seaming uses two sequential seaming operations on the same rotary seaming head. In the first seam operation, a seaming chuck holds the can body while the first seaming roll hooks and curls the lid edge under the can flange, creating a five-layer interlocked fold. In the second seam operation, a different (flatter) seaming roll presses and flattens the fold, compressing the five layers into a tight hermetic seal. The entire double-seam operation takes 0.3–0.8 seconds per can at production speed. Can end sealant (sealing compound applied to the inside of the lid curl) ensures the gas-tight seal even with minor imperfections in the can or lid dimensions.

A basic edible oil tin can filling line (fill + seam + conveyor) for 500–1,000 cans/hr handling 1L–5L cans starts at approximately $25,000–$45,000. A mid-range line for 1,000–2,000 cans/hr with automatic can feeding, filling, lid placement, seaming, and outfeed costs approximately $60,000–$100,000. A complete turnkey line for 2,000–2,500 cans/hr including depalletizer, filling, seaming, coding, case packing and palletizer is $150,000–$250,000. Investment depends significantly on the can size range (a machine handling only 5L cans is simpler than one handling 1L–20L), the level of automation, and the integration with upstream can manufacturing or downstream secondary packaging.

The key advantage of tin cans for edible oil is oxygen barrier performance. Tin plate (steel + tin coating) has an oxygen transmission rate (OTR) of essentially zero — metal does not allow oxygen to pass through. By contrast, PET bottles (OTR approximately 0.05–0.3 cc/100in²/day) and HDPE bottles (OTR approximately 0.5–2.0 cc/100in²/day) allow some oxygen permeation over time. For edible oils with a high proportion of polyunsaturated fatty acids (sunflower oil, corn oil, soybean oil), oxygen exposure causes oxidative rancidity — producing off-flavors (hexanal, 2-nonenal) that reduce product quality within 6–12 months in plastic containers but 18–24+ months in tin. For olive oil and premium cooking oils exported to markets with long distribution chains, tin packaging is often specified for its shelf life advantage.