Keypack Intelligent Automatic Granule Double Line Weighing and Packaging Machine KL-422
A dual-line automatic granule packaging solution engineered for high-throughput, precision-weighing production environments. It delivers 35–80 bags per minute across a flexible bag size range of L60–300mm × W60–200mm, with consistent fill-weight accuracy for every cycle. Ideal for food processing, chemical manufacturing, agricultural product packaging, and pharmaceutical granule bagging lines.
Product Overview
The KL-422 is a fully automatic double-line weighing and packaging machine purpose-built for granular materials. By running two independent packaging lines in parallel, the KL-422 effectively doubles production output compared to single-line machines — without requiring double the floor space or labor. The machine integrates a high-precision multi-head weighing system with a servo-driven film feeding mechanism and a PLC touch-screen control panel, enabling operators to set, monitor, and fine-tune every packaging parameter from a single interface.
Constructed with food-grade stainless steel on all product-contact surfaces, the KL-422 meets strict hygiene standards for food and pharmaceutical applications. Its modular design supports rapid changeover between bag sizes and product types, minimizing downtime during production shifts. Whether you are packaging free-flowing granules, pellets, seeds, or coarse powders, the KL-422 delivers reliable, repeatable results at industrial scale.
Keypack Intelligent (kunbupack) KL-422 is backed by a full-service support program including factory acceptance testing, on-site installation and commissioning, operator training, and a comprehensive spare-parts supply chain — ensuring your line stays running from day one.
Product Specifications
| Model |
KL-422 |
| Configuration |
Double Line (Dual Channel) |
| Packaging Speed |
35–80 bags/min (per line; total output up to 160 bags/min combined) |
| Bag Length Range |
60–300 mm |
| Bag Width Range |
60–200 mm |
| Weighing Accuracy |
±0.5–1% (material-dependent) |
| Sealing Type |
Back seal, Gusseted back seal |
| Film Material |
PE, PP, OPP/PE, PET/PE, NY/PE, aluminum foil laminate |
| Power Supply |
220V / 380V, 50/60 Hz (customizable by region) |
| Air Supply |
0.6 MPa, ≥0.3 m³/min compressed air |
| Control System |
PLC + 7-inch color touch screen HMI |
| Machine Dimensions |
Contact sales for exact footprint (varies by configuration) |
| Machine Weight |
Contact sales for exact weight (varies by configuration) |
| Contact Material |
SUS304 stainless steel |
Key Features and Machine Characteristics
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Dual-Line Parallel Output: Two independent packaging channels operate simultaneously, doubling throughput and maximizing ROI on a single machine footprint — ideal for high-volume granule packaging lines.
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High-Precision Multi-Head Weighing: Integrated combination weigher delivers ±0.5–1% fill-weight accuracy, reducing product giveaway and ensuring compliance with net-weight labeling regulations.
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Servo-Driven Film Feed: Servo motor controls film pulling length with high repeatability, enabling precise bag length adjustment and consistent seal positioning across all bag formats.
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PLC Touch-Screen Control: Intuitive 7-inch HMI allows operators to store multiple product recipes, monitor real-time production data, and diagnose faults without specialized training.
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Rapid Bag-Size Changeover: Tool-free or minimal-tool adjustment for bag width and length changes, reducing changeover downtime to minutes rather than hours.
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Food-Grade Stainless Steel Construction: All product-contact parts are SUS304 stainless steel, meeting food safety and GMP standards for hygienic granule packaging.
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Back Seal & Gusseted Back Seal: Supports standard back seal (pillow bag) and gusseted back seal formats, providing a stable, stand-up bag structure ideal for retail display and bulk granule packaging.
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Wide Film Compatibility: Works with PE, OPP/PE, PET/PE, NY/PE, and aluminum foil laminate films, giving you full flexibility over barrier properties and shelf-life requirements.
Application Areas
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Food Industry: Sugar granule automatic weighing and back-seal bagging for retail; salt and seasoning granule back-seal packaging for portion packs; coffee bean dual-line high-speed back-seal bagging with nitrogen flushing; rice and grain automatic weighing and pillow-bag packaging for e-commerce fulfillment; dried fruit and nut granule back-seal packaging for snack brands; pet food kibble automatic weighing and back-seal bagging.
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Agricultural Products: Seed granule precision weighing and back-seal packaging for planting sachets; fertilizer pellet automatic back-seal bagging for agricultural retail; animal feed pellet dual-line high-speed back-seal packaging for farm supply distributors.
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Chemical Industry: Plastic resin pellet automatic weighing and back-seal packaging for industrial supply; detergent granule back-seal bagging for household product brands; chemical catalyst granule precision back-seal packaging for laboratory and industrial use. Note: food-grade stainless steel contact parts are standard; consult Keypack Intelligent for corrosive or hazardous material requirements.
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Pharmaceutical & Nutraceutical: Pharmaceutical granule GMP-compliant automatic weighing and back-seal packaging; vitamin and supplement granule precision bagging for health product brands; herbal granule dual-line back-seal packaging for traditional medicine manufacturers.
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Hardware & Industrial: Small hardware granule (screws, nuts, fasteners) automatic counting-weighing and back-seal bagging for retail display; plastic pellet back-seal packaging for injection molding material supply.
Frequently Asked Questions
- Q1: What is the difference between the two lines on the KL-422 — do they operate independently or must they run the same product and bag size?
- The two lines on the KL-422 are mechanically independent channels sharing a common frame and control system. In standard configuration, both lines are set to the same bag size and product parameters for synchronized high-speed output. However, the machine can be configured to run different bag lengths on each line simultaneously — contact Keypack Intelligent to confirm the specific dual-recipe configuration for your application.
- Q2: Can the KL-422 handle products with irregular granule sizes or mixed granule blends?
- Yes. The KL-422's multi-head combination weigher is designed to handle a range of granule sizes and mixed blends, provided the material is free-flowing and dry. For products with significant size variation (e.g., mixed nuts or blended seeds), the weigher head configuration and vibration settings can be tuned during commissioning to maintain target fill-weight accuracy within ±1%.
- Q3: How long does it take to change over the KL-422 from one bag size to another?
- Bag-size changeover on the KL-422 is designed for minimal downtime. Adjusting bag width requires repositioning the forming tube and sealing jaws, while bag length is set digitally via the HMI. A trained operator can typically complete a full changeover in 15–30 minutes. Keypack Intelligent provides a changeover guide and operator training as part of the standard commissioning package.
- Q4: What after-sales support and warranty does the KL-422 come with?
- The KL-422 includes factory acceptance testing (FAT) before shipment, on-site installation and commissioning support, and operator training. The machine comes with a standard 12-month warranty covering manufacturing defects on mechanical and electrical components. Keypack Intelligent maintains a spare-parts inventory for the KL-422 and offers remote technical support via video call for rapid fault diagnosis. Extended warranty and preventive maintenance contracts are available on request.
