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Fanchi-tech FA-CW230 Checkweigher with Drop-down Rejector Cuts Packaging Damage to Zero for High-speed Seasoning Sachet Line

Published on July 2, 2026 | Industrial Weighing Inspection Solutions
For small-sachet food manufacturers running high-speed packaging lines, accurate net weight control and damage-free rejection have long been conflicting operational challenges. Traditional push-type rejectors often puncture thin soft packaging, causing product leakage and unexpected line downtime, while manual sampling fails to keep pace with high-output production. Recently, Shanghai Fanchi-tech Machinery Co., Ltd. deployed its FA-CW230 inline checkweigher with drop-down rejector for a well-known seasoning sachet manufacturer in Southeast Asia, achieving 100% full weight inspection with zero package damage and significantly improving the customer's production profitability and compliance performance.

Client Challenges

The customer is a professional manufacturer of single-serve seasoning sachets (edible salt, sugar, soy sauce packets) supplying to instant food brands and catering industries, with 8 vertical packaging lines running 20 hours a day. Before adopting Fanchi-tech's solution, the production line faced three core pain points:
  • High package damage rate: The original push-rod rejector frequently scratched or punctured thin-film sachets, leading to a 1.2% product damage rate, raw material waste and frequent line shutdowns for conveyor cleaning.
  • Insufficient compliance guarantee: Manual random inspection only covered about 5% of total output, resulting in repeated underweight complaints from downstream brand customers and payment deduction for non-conforming batches.
  • Low level of digital management: Paper-based weight records could not support real-time process optimization, and the filling deviation of packaging machines could not be corrected in time, causing persistent invisible raw material loss.
After on-site evaluation of the customer's sachet specifications (3–50g, laminated film packaging) and line layout, Fanchi-tech configured the FA-CW230 high-precision checkweigher with a dedicated drop-down rejector for each packaging line. The equipment adopts a full 304 stainless steel body, which meets food-grade hygiene requirements and can be seamlessly docked with the customer's existing packaging machines without large-scale modification of the original line structure.
Core configurations and scenario-matching advantages:
  • High-precision weighing system: Equipped with an imported digital load cell, it achieves ±0.2g weighing accuracy within the 3–50g weighing range, and stably runs at a detection speed of up to 220 sachets per minute, fully matching the high-speed rhythm of vertical packaging lines.
  • Drop-down damage-free rejection mechanism: Different from traditional push-type structures, unqualified products fall into the stainless steel collection box through the downward turnover of the belt section, with no hard contact with the packaging surface. It completely avoids sachet puncture and material leakage, and is especially suitable for thin-film soft packaging and small-size products.
  • Food-grade hygienic design: The whole machine is made of brushed 304 stainless steel with rounded corner design and no sanitary dead corners. The transparent acrylic protective cover on the weighing section prevents foreign objects from falling in while allowing operators to observe the operation status in real time.
  • Intelligent control system: The 7-inch color touch screen supports storage of up to 100 product formulas, one-click parameter switching, and real-time display of weighing data, pass rate and rejection statistics. Front-line operators can master the operation without long-term professional training.
  • Stable mechanical structure: Height-adjustable support feet with anti-slip rubber pads adapt to uneven workshop floors, effectively reducing weighing deviation caused by equipment vibration and ensuring long-term stable operation at high speed.
  • Standardized safety design: The control cabinet is equipped with an emergency stop button and running status indicator light, and the rejection area is equipped with a protective baffle, which fully complies with industrial safety production standards.

Measurable Operation Results

After 2 months of stable operation, the customer's 8 production lines have achieved comprehensive improvements in quality control efficiency and cost control:
  1. Zero packaging damage loss: The drop-down rejection structure completely solves the problem of sachet puncture, and the product damage rate drops from 1.2% to 0, saving about 78,000 USD in material loss every year.
  2. 100% net content compliance: Full inspection of all finished products eliminates underweight outflow. No net content non-conformity was found in customer acceptance and market sampling, and the downstream complaint rate dropped to zero.
  3. Raw material waste reduced by 9%: Real-time weight data feedback helps the production department optimize the filling parameters of packaging machines and reduce the average excess filling volume, with annual raw material cost savings reaching 125,000 USD.
  4. Significant labor cost reduction: Each original line was equipped with 2 weighing inspectors, while now only 1 operator is needed for patrol management of 8 lines, saving 14 labor positions in total.
  5. Digital quality traceability: Weighing data can be exported and archived, which meets the traceability requirements of food safety management systems such as HACCP and ISO22000, and helps the customer pass the supplier audit of international brand customers smoothly.
The FA-CW230 series is a classic light-weight checkweigher model of Fanchi-tech, which is widely used in food, pharmaceutical, daily chemical and other industries. When matched with a drop-down rejector, it has unique scenario advantages:
  • Ideal for soft sachets, pouches, small cartons and other fragile or easily scratched packages
  • Millisecond-level high-speed rejection response, no jamming at a speed of 200+ pieces per minute
  • Modular belt structure, quick disassembly for cleaning and maintenance, effectively reducing equipment downtime
  • Customizable conveying height and conveyor width to perfectly match various types of packaging equipment
Shanghai Fanchi-tech Machinery Co., Ltd. specializes in R&D and manufacturing of industrial inspection equipment, providing global manufacturing customers with professional solutions including checkweighers, metal detectors and X-ray inspection systems. With rich on-site customization experience and a complete product matrix, the company serves customers in more than 30 countries and regions, and is committed to helping clients improve production quality and reduce operational costs.
For more details about FA-CW230 checkweigher and customized weight inspection solutions, welcome to contact our team:
Post time: Jul-02-2026
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