Big Bag Vertical Packing Machine
Engineered for high-accuracy large-format weighing and bagging of powder and granule materials. It delivers a weighing range of 10–50 kg with auger metering for powders and weighing-scale metering for granules, controlled by a PLC system with touchscreen HMI for effortless operation. Ideal for food processing, grain packaging, and bulk chemical industries requiring reliable, hygienic, and efficient large-bag filling.
Product Overview
The Keypack Intelligent (kunbupack) Big Bag Vertical Packing Machine is a robust, fully automatic large-bag packaging solution designed to handle a wide range of free-flowing powder and granule materials. With a weighing capacity of 10–50 kg per bag, it is purpose-built for industries that require precise, high-throughput bulk packaging. The machine features a PLC-controlled system with an intuitive touchscreen human-machine interface (HMI), enabling operators to set parameters, monitor production, and switch between material types with minimal downtime. The all-stainless-steel construction meets GMP and food-grade hygiene standards, while the modular or open-style hopper design makes cleaning fast and thorough — a critical advantage for multi-SKU production lines.
Two metering modes are integrated into a single platform: auger (screw) metering for fine powders ensures consistent fill accuracy even with cohesive or aerated materials, while a weighing-scale metering system handles granules and coarse particles with high repeatability. This dual-mode capability makes the machine exceptionally versatile across product types without requiring separate equipment.
Key Features and Machine Characteristics
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Dual Metering System: Auger (screw) metering for powders + weighing-scale metering for granules — one machine handles both material types with high fill accuracy.
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PLC Control + Touchscreen HMI: Siemens/Mitsubishi PLC with color touchscreen interface enables easy parameter setting, recipe storage, and real-time production monitoring — minimal operator training required.
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All Stainless Steel Construction: Full 304 stainless steel contact parts and frame meet food-grade and GMP hygiene requirements, ensuring product safety and regulatory compliance.
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Modular / Open-Style Hopper: Combinable or fully openable hopper design allows thorough cleaning between product changeovers — ideal for multi-product lines handling allergens or different material grades.
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Wide Weighing Range (10–50 kg): Covers standard large-bag formats including 10 kg, 20 kg, 25 kg, and 50 kg, accommodating diverse packaging requirements without mechanical adjustment.
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Stable and Reliable Bag Filling: Consistent bag forming, filling, and sealing sequence minimizes product spillage and ensures uniform bag appearance for downstream palletizing and logistics.
Application Areas
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Food Industry: Sugar (white sugar, caster sugar) large-bag weighing and vertical filling; rice and grain pneumatic or gravity feeding into 10–50 kg bags; milk powder and dairy blends auger-metered filling under dust-controlled conditions; starch (corn starch, tapioca starch) powder bagging with screw metering; snack foods and roasted nuts (dried fruits, mixed nuts, seeds) granule weighing and bagging; candy and confectionery bulk packaging into large retail or wholesale bags; milk tea powder and instant beverage blends precision filling for foodservice packs.
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Pharmaceutical & Health Products: Nutraceutical powders and protein supplements large-format filling under GMP-compliant conditions; herbal granules and traditional medicine bulk packaging with weighing-scale metering.
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Chemical & Industrial: Fertilizer granules and agricultural chemicals large-bag filling; detergent powder and washing powder bulk packaging; plastic pellets and resin granules weighing and bagging for industrial supply chains.
Frequently Asked Questions (FAQ)
Q1: What is the weighing range of this big bag packing machine?
The machine supports a weighing range of 10–50 kg per bag, covering the most common large-bag formats such as 10 kg, 20 kg, 25 kg, and 50 kg. The target weight can be set and adjusted directly via the touchscreen HMI without mechanical changes.
Q2: What types of materials can this machine handle?
It is designed for free-flowing to moderately cohesive dry powders and granules, including sugar, rice, milk powder, starch, milk tea powder, roasted nuts, dried fruits, candy, fertilizer granules, detergent powder, and plastic pellets. Materials with high moisture content, extreme stickiness, or very fine particle size (<100 mesh) may require customized feeding solutions — please contact us for a material suitability assessment.
Q3: What is the difference between auger metering and weighing-scale metering? Which one does my product need?
Auger (screw) metering is used for fine powders (e.g., milk powder, starch, sugar powder) where volumetric consistency and dust control are critical. Weighing-scale metering is used for granules and coarser particles (e.g., rice, nuts, granulated sugar, pellets) where weight accuracy per bag is the priority. Our engineering team can recommend the right metering mode based on your material's bulk density, flowability, and particle size.
Q4: How accurate is the weighing system?
The machine uses a high-precision load cell weighing system. Typical weighing accuracy is ±0.2%–0.5% depending on material characteristics and target weight. For fine powders using auger metering, accuracy is maintained through controlled screw speed and a two-stage fast/slow feeding approach.
Q5: How easy is it to clean the machine between product changeovers?
The machine features a modular or fully openable hopper design, allowing all product-contact surfaces to be accessed and cleaned quickly. All contact parts are made of 304 stainless steel with smooth, crevice-free surfaces. For food and pharmaceutical applications, the machine can be cleaned dry or with water depending on material requirements.
