Animal Feed Bagging Machine —Pellet, Meal & Mash

Net Weight — Pellets

The most common enquiry in our feed segment. Pelleted compound feed (2–8 mm pellets) is free-flowing with good bulk density consistency, but the high void ratio creates the bag height problem described above. Our standard pelleted feed system includes a de-aeration spear that inserts into the filling bag and vents displaced air through a dust filter, plus a 2-metre vibration conveyor after sealing to settle the bag before it reaches the palletiser.

Net weight filling is standard — not because pellet bulk density varies dramatically, but because formula switching between poultry, swine, and cattle rations involves different pellet sizes that have different packing densities. A single net weight system handles all formulas without recalibration. Tested accuracy at production scale: ±0.3–0.6% for 25 kg bags, measured across 30 consecutive bags in pre-shipment validation.

• Bag weight:10 kg – 50 kg
• Speed:6–12 bags/min (single-spout)
• Accuracy:±0.3–0.6% (net weight)
• De-aeration:Spear + vibration conveyor standard
• Sealing:Bag-top folder + stitcher

Meal & Mash

Ground meal and mash have variable particle size distribution, higher cohesion than pellets, and significant batch-to-batch bulk density variation depending on grinding fineness. Net weight filling is the correct choice. De-aeration requirements are lower than for pellets but a dust extraction hood at the fill spout is essential — meal filling generates significant airborne fines.

• Bag weight:10 kg – 50 kg
• Speed:4–9 bags/min
• Accuracy:±0.5–0.8% (net weight)
• Dust containment:Extraction hood standard

Pet Food

Kibble and expanded pet food have the highest void ratio of any feed product — up to 55% air by volume at fill. Bag height management is critical. Kraft paper bags with PE liner (typical premium pet food format) require a different bag presenter and heat-seal closure vs PP woven bags. Branding print protection on clamp surfaces is specified as standard for premium pet food bags.

• Bag weight:1 kg – 20 kg
• Speed:5–14 bags/min
• Bag formats:Kraft-PE, PP woven, laminated
• Void ratio:High — extended de-aeration

Premix & Supplement

Vitamin/mineral premixes, trace element supplements, and medicated feed powders in 5–25 kg bags. Variable bulk density, high-value product (overfill is costly), and cross-contamination risk between formulas. Net weight filling with full containment extraction for fine inhalable minerals (selenium, copper sulfate). Flush procedure documented for medicated to non-medicated changeover.

• Bag weight:1 kg – 25 kg
• Speed:4–8 bags/min
• Containment:Full enclosure option for hazardous minerals
• Flush:Documented flush procedure standard

Dual Spout

Two independent fill heads on one frame for feed mills needing 12–20 bags per minute at 25 kg. Each spout has its own load cell, bag clamp, and de-aeration system. If one spout requires maintenance, the other continues at half capacity. Matched to a dual-lane bag stitcher — the stitcher is typically the line bottleneck, not the filler.

• Bag weight:10 kg – 50 kg
• Speed:10–20 bags/min
• Spouts:2 independent (each with load cell)
• Redundancy:Single-spout fallback during maintenance

Semi-Automatic

For small feed mills and farm-based mixers producing under 3 bags per minute. Gravity or auger fill, manual bag placement, foot-pedal trigger. Accurate enough for unregulated internal use but not appropriate for commercial feed under weight regulation. Capital cost $4,000–$8,000 — the gap to automatic net weight is justified once production exceeds approximately 3,000 bags per month.

• Bag weight:10 kg – 50 kg
• Speed:2–4 bags/min (operator)
• Accuracy:±1–3%
• Best for:Farm mixers, small mills, R&D

Bag is placed manually or by automatic bag placer onto the fill spout. Pneumatic clamps grip the bag mouth. For PP woven bags, clamp pressure is calibrated to hold the bag securely without tearing at the woven edge — 10–15% of buyers who specify standard industrial clamps find they tear the bag mouth on medium-weight PP woven with a tight top hem.

For pelleted and crumbled feed, a de-aeration spear inserts into the bag through a dedicated port before filling begins. This vents displaced air through a dust filter as product fills from the bottom up. The fill gate opens — coarse fill to ~85% of target, then fine fill to set-point. The de-aeration spear withdraws as the bag nears full.

Load cell triggers cut-off valve when net weight target is reached, accounting for in-flight product. Fill weight is logged. For formula-switching lines, the PLC recipe system changes the set-point between formulas automatically — no manual adjustment required at changeover.

Filled bag releases onto a vibration conveyor (1.5–3 m) to settle product and reduce headspace. Bag top is folded into a uniform closure and stitched or heat-sealed. Settled and stitched bags stack stably on pallets — un-settled bags do not. This step is where most low-cost feed bagging lines fail to function reliably.

Broiler and layer feed in 25 kg and 50 kg PP woven bags. Crumble feed for chicks requires smaller fill spout geometry than standard pellets. Bulk density varies between pellet diameters (2 mm starter vs 4 mm grower) — net weight filling handles this without recalibration between batches.

Compound feed and TMR (total mixed ration) components in 25–50 kg bags. Mixed rations with long-particle roughage can bridge in standard fill spouts — spout diameter and agitator specification are sized for mixed ration specifically. De-aeration is less critical than for pelleted feed but a bag vibration station is still recommended for pallet stability.

Prestarter and starter pellets in 10–25 kg bags. Smaller bag sizes mean higher bag per hour rates — a single-spout system running 10 kg bags produces roughly 2.5× the output in bag count vs 25 kg bags. Conveyor length and stitcher speed must be matched to the higher bag rate.

Floating and sinking pellets for fish and shrimp in 5–20 kg bags. Floating pellets have the highest void ratio of any feed product (55–65% air). Extended de-aeration and slow bag-settling speeds are required. Moisture barrier bag specification is critical — aquaculture feed bags are often stored in high-humidity environments.

Premium kibble and extruded pet food in 1.5–15 kg retail bags. Branding print quality and bag presentation matter more than in industrial feed markets. Non-marking clamp surfaces, precise bag orientation for print consistency, and heat seal closure for kraft-PE bags are standard specifications.

Chaff, cubed hay, coarse mix rations, and pelleted horse feed in 15–25 kg bags. Long fibre in chaff and coarse mix requires a wider fill chute and a longer de-aeration spear than standard pellet systems. These are lower-volume markets — semi-automatic systems are often cost-justified unless output exceeds 5,000 bags/month.

Pelleted poultry feed and expanded fish feed have very different void ratios — what works for one will not be calibrated correctly for the other. We ask for pellet diameter, bulk density, and approximate void ratio (or product type) before specifying the de-aeration spear length, vibration conveyor speed, and bag settling time. Generic de-aeration settings produce the bag height problems that generate complaints about the machine when the actual issue is a calibration specification.

Feed mills producing multiple species formulas on the same line need a recipe management system, not just a set-point dial. Our PLC systems store up to 50 product recipes — fill weight, coarse/fine flow switchpoint, in-flight correction factor, and de-aeration time — selectable by product name at the HMI. Changeover time between formulas is under 2 minutes for a recipe switch; the line can run the next formula within one bag cycle of triggering the changeover.

Carry-forward of medicated feed residue into non-medicated batches is a serious regulatory issue in most markets — not just a cleanliness concern. We design a documented flush procedure into the machine sequence: quantity of product to flush, collection method for flush product, and cleaning record trigger. For customers subject to feed safety audit (GMP+, FAMI-QS, HACCP), this documentation is part of the machine delivery package, not an afterthought.

Speed tests on feed bagging machines are typically run with a reference product (free-flowing granules). Your product — particularly if it is meal, mash, or a high-void-ratio pellet — will fill at a different rate. We offer pre-shipment testing with a product sample you provide, and the speed test report reflects your actual product performance. If the result is below the quoted speed, we resolve it before shipment rather than after.

General-purpose bagging systems for powders, granules, and free-flowing materials including feed ingredients.

The broader open-mouth bag filling category covering all industrial sack applications including feed.

Grain-specific bagging systems for wheat, corn, rice, and dried cereals with high-speed throughput.

Complete feed packaging lines integrating filling, sealing, checkweighing, and palletising.