Hardware Multihead Weigher for Small Hardwares Combined Scale

Keypack Intelligent KB-A10 / KB-A14 Multihead Weigher — a high-precision hardware combination scale engineered for automatic weighing and packaging of fasteners, screws, nuts, bolts, rivets, and small metal parts. It delivers a weighing range of 10–2000g (KB-A10) or 10–3000g (KB-A14) at speeds up to 65 PPM and 120 PPM respectively, with X(0.5) accuracy class and step motor drive for consistent, repeatable results. Ideal for hardware packaging lines integrating VFFS (vertical form fill seal) machines, pre-made pouch packaging machines, and automatic hardware bagging systems.

Product Overview

The Keypack Intelligent (kunbupack) KB-A Series is a purpose-built automatic multihead weigher for fasteners and small hardware components, designed to integrate seamlessly with VFFS packaging machines, pre-made bag packaging machines, and fully automatic hardware bagging lines. Whether you are packaging screws, bolts, nuts, rivets, anchors, washers, or mixed hardware assortments, the KB-A Series delivers high-precision hardware weighing with minimal giveaway and maximum throughput.

Built around a custom-designed high-precision load cell with exceptional shock resistance, the KB-A10 and KB-A14 handle the irregular shapes, mixed densities, and abrasive surfaces typical of metal parts and fasteners — conditions that challenge standard combination scales. The reinforced center body structure and heavy-duty linear feeders ensure stable, uniform material flow even with high-density metal components, making this the ideal hardware weighing machine for demanding production environments.

With 100 preset parameter groups, multilingual interface, and automatic shortage pause, the KB-A Series supports multi-SKU hardware packaging operations and global deployment. Both models are compatible with downstream VFFS baggers, pre-made pouch machines, and automatic hardware bagging machines via timing hopper synchronization.

Key Features and Machine Characteristics

• High-Precision Custom Load Cell for Metal Parts: Specially designed sensor with superior shock resistance and long service life — built to withstand the impact loads generated by heavy fasteners, bolts, and metal components during high-speed weighing cycles.
• VFFS & Packaging Machine Compatible: Timing hopper option enables precise discharge synchronization with VFFS machines, pre-made bag packaging machines, and automatic hardware bagging lines for seamless line integration.
• Factory Parameter Restore & Multi-Point Weight Calibration: Quickly restore default settings or perform multi-segment calibration to maintain accuracy across different hardware SKUs, fastener types, and batch sizes.
• Automatic Shortage Pause: The machine automatically pauses when material runs low, preventing underweight packs and maintaining consistent output quality on the hardware packaging line without operator intervention.
• Independent Amplitude Adjustment per Linear Feeder: Each feeder's vibration amplitude can be tuned individually during operation — critical for handling mixed hardware assortments, irregular fastener shapes, and varying metal part densities.
• Heavy-Duty Linear Feeders for Metal Parts: Oversized, purpose-built linear vibrators deliver faster and more uniform discharge of screws, nuts, bolts, and rivets, reducing bridging and jamming common with metal hardware.
• Reinforced Center Body Structure: The enlarged center frame increases overall machine rigidity, shortening weighing stabilization time and improving cycle-to-cycle consistency — essential for high-speed hardware weighing machine performance.
• Anti-Noise PVC Contact Parts: All product-contact components are fitted with noise-dampening PVC to significantly reduce operational noise generated by metal-on-metal contact during fastener weighing.
• 100 Parameter Presets: Store up to 100 complete parameter sets to accommodate diverse hardware SKUs — enabling fast changeovers between screw sizes, bolt types, and mixed hardware assortments.
• Multilingual Interface: Supports multiple languages for global market deployment, with an intuitive 7" touch screen and built-in help menu for easy operator training on the hardware packaging line.
• Thickened & Reinforced Custom Hopper: Purpose-built heavy-duty hopper designed for durability under the continuous impact and abrasion of metal parts and fasteners.

Technical Specifications

Application Areas

• Fasteners & Screws: Wood screws, self-tapping screws, machine screws, and drywall screws — fixed-weight or count-by-weight packaging for retail display bags and industrial bulk packs. Compatible with VFFS bagger for automatic screw bagging lines.
• Bolts & Nuts: Hex bolts, carriage bolts, hex nuts, and flange nuts — accurate portioning for hardware retail packaging and e-commerce fulfillment. Integrates with pre-made pouch packaging machines for finished bag output.
• Rivets & Anchors: Pop rivets, blind rivets, wall anchors, and expansion bolts — high-speed weighing for blister card and poly bag packaging on automatic hardware bagging lines.
• Washers & Clips: Flat washers, spring washers, retaining clips, and circlips — handles thin, flat, and interlocking metal parts with stable linear feeder control.
• Mixed Hardware Assortments: Screw-and-nut kits, bolt-and-washer sets, and mixed fastener packs — multi-head combination weighing ensures accurate total weight for assortment packaging.
• Small Metal Parts & Components: Hinges, brackets, pins, cotter pins, and small stamped metal parts — suitable for hardware packaging lines serving DIY retail, construction supply, and industrial distribution channels.
• Electronic Hardware: Standoffs, PCB screws, cable clips, and small electronic fasteners — precision weighing for electronics assembly kits and retail packaging.
• Snack & Food (Secondary Application): Nuts, seeds, dried fruits, candy, and frozen food — the KB-A Series is equally capable on food packaging lines when hardware production is not running, maximizing equipment utilization.

VFFS & Packaging Machine Integration

The KB-A Series multihead weigher is designed for direct integration with VFFS (vertical form fill seal) packaging machines, pre-made bag (give-bag) packaging machines, and automatic hardware bagging systems. The optional timing hopper synchronizes weigher discharge with the bagger's film or bag cycle, ensuring accurate, jam-free filling at full line speed. The compact footprint and standard discharge height make the KB-A10 and KB-A14 compatible with most major VFFS bagger brands and hardware packaging line configurations. For complete turnkey hardware packaging line solutions — including multihead weigher, VFFS machine, labeler, and conveyor — contact Keypack Intelligent for a customized line proposal.

Options & Customization

• Dimple Plate: Reduces product sticking and improves flow for coated or oiled fasteners and metal parts.
• Timing Hopper: Synchronizes discharge with downstream VFFS machines, pre-made pouch machines, and automatic hardware bagging lines for seamless integration.
• Printer Module: Integrates label or date printing directly into the weighing cycle for traceability and retail compliance.
• Reject Device: Automatically removes out-of-tolerance packs from the hardware packaging line, ensuring 100% compliant output.

Delivery & Support

• Standard lead time: 15–30 working days (subject to configuration and order volume).
• Installation guidance and remote commissioning support available.
• Operator training documentation and video tutorials provided.
• Spare parts supply and after-sales technical support included.