The Keypack Intelligent KL-1250 Vertical Form-Fill-Seal Machine is a large-format, servo-driven VFFS Machine engineered for precise back-seal bag forming across a wide range of irregular block, granular, powder, and liquid materials. It delivers a packaging speed of 5–30 bags/min with bag sizes up to L 800 mm × W 600 mm, powered by a PLC servo control system for consistent accuracy and reliability. Ideal for food, powder, and liquid packaging lines requiring wide-film capability and stable continuous operation.
Product Overview
The Keypack Intelligent (Kunbupack) KL-1250 Vertical Packaging Machine is designed for automated large-format packaging, integrating metering, bag forming, filling, sealing, date printing, gas flushing or evacuation, finished product conveying, and automatic counting into a single continuous workflow. Driven by a PLC servo system combined with a pneumatic control system and a large touchscreen HMI, the KL1250 achieves high control precision, operational reliability, and intelligent automation suited to demanding production environments.
Supporting bag sizes from L 150–800 mm × W 150–600 mm, this back-seal vertical packaging machine accommodates a broad range of packaging formats for both retail and bulk applications. The optional single-belt or double-belt film feeding system ensures fast, smooth film transport with low friction and minimal material waste, supporting extended continuous production runs. Compatible metering and conveying systems can be configured based on product characteristics, enabling the machine to serve as a complete automatic metering packaging machine tailored to specific production requirements.
Key Features and Machine Characteristics
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PLC Servo Control System: Integrates a PLC servo system, pneumatic control system, and large touchscreen HMI as the core drive control unit, maximizing control precision, reliability, and intelligent automation across the full packaging cycle — a key advantage for high-demand food packing machine and powder packing machine applications.
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Intelligent Temperature Control: Precision temperature controller maintains accurate sealing temperatures, producing neat, flat, and consistent seals on every bag — critical for moisture-sensitive products such as milk powder and seasonings.
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Full-Process Automation: When paired with compatible metering configurations, the granular packaging machine or powder packaging machine setup automatically completes metering, feeding, filling, bag forming, date printing, gas flushing or evacuation, finished product conveying, and counting in a single uninterrupted process.
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Multi-Product Parameter Storage: Touchscreen stores packaging parameters for multiple product types, enabling rapid changeover without reconfiguration — reducing downtime on mixed or multi-SKU production lines.
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Single-Belt or Double-Belt Film Feeding: Optional belt-driven film transport delivers fast, stable film feeding with low friction and minimal wear, supporting long-term continuous production with wide packaging film formats.
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Flexible Bag Format Options: Supports pillow-type back-seal bags and hanging-hole bags, customizable to specific packaging and retail display requirements.
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Safety Protection Systems: Equipped with comprehensive safety guarding to meet enterprise safety management standards for automated packaging equipment.
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Fault Display System: Integrated fault diagnostics assist operators in timely identification and resolution of machine malfunctions, minimizing unplanned downtime on active production lines.
Application Areas
The KL1250 vertical form-fill-seal machine is suitable for measuring and packaging of irregularly shaped block, granular, powder, and liquid materials. It functions as a versatile food packaging machine, liquid packaging machine, and powder packing machine depending on the metering and conveying configuration selected.
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Snack & Confectionery: Candy, puffed snacks, small biscuits — granular filling and large-format back-seal bag forming for retail and bulk packaging
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Nuts & Dried Fruits: Roasted nuts, dried fruits, seeds — granular packaging machine configuration for irregular-shaped solid materials with variable fill weights
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Sugar & Sweeteners: Granulated sugar, powdered sugar — powder packing machine setup with accurate metering for consistent fill weight
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Frozen Foods: Quick-frozen food items requiring sealed, moisture-resistant packaging with gas flushing or evacuation for extended shelf life
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Dairy & Beverage Powders: Milk powder, milk tea powder — powder packaging machine configuration for fine, free-flowing powders requiring precise fill volume control
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Starch & Flour Products: Starch, flour, and similar powder materials requiring consistent fill weight and sealed, tamper-evident packaging
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Seasonings & Condiments: Seasoning blends, spice powders — powder filling and sealing machine setup for small-to-large batch packaging with date printing
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Sauces & Liquid Products: Sauces, beverages, and other liquid or semi-liquid materials — liquid packaging machine configuration with appropriate filling system integration
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Block & Irregular-Shaped Materials: Irregular block-form products that require stable bag forming and reliable sealing across varying material dimensions
Machine Specifications
| Parameter |
KL-1250 Vertical Form-Fill-Seal Machine |
| Bag Type |
Back-seal (pillow bag); optional hang-hole bag |
| Bag Size (L × W) |
L: 150–800 mm, W: 150–600 mm |
| Film Roll Width |
N/A |
| Packaging Material |
N/A |
| Packaging Speed |
5–30 bags/min |
| Max. Fill Volume |
N/A |
| Power Supply |
AC 220V, 50/60Hz |
| Power Consumption |
5.0 kW |
| Compressed Air Pressure |
6–8 kg/m² |
| Air Consumption |
0.3 m³/min |
| Machine Dimensions (L × W × H) |
2128 mm × 2057 mm × 2385 mm |
| Machine Weight |
500 kg |
The KL1250 can be integrated with compatible weighing and filling machine systems, conveying systems, and downstream equipment to form a complete automated vertical packaging machine line tailored to specific production requirements and output targets.
