Description

Twin-Nozzle Semi-Automatic Gravimetric Filling and Sealing Line for Primers, Paints, and Viscous Chemicals in Buckets – 
– Equipped with a Mobile Roll-Under Dosing Station and Automatic Capping Press

LFSG-500: An Innovative Line for High-Throughput and Flexible Filling of Viscous Materials

In the modern competitive environment of paint and industrial chemical manufacturing, packaging efficiency directly impacts profitability and the ability to meet order deadlines. The semi-automatic LFSG-500 line with dual weigh fillers and a mobile dosing station represents a strategic solution designed to overcome key operational challenges. It not only doubles filling speed through parallel dual-head operation but also solves one of the most labor-intensive tasks – cleaning and product changeover. Thanks to the engineering thought invested in every unit, this line ensures an uninterrupted workflow, maximum weight-dosing accuracy, and compliance with the strictest packaging quality requirements for challenging products like thixotropic primers, thick paints, and solvent-based adhesives.

Detailed Technical Specifications and Design Features

• Operating Mode & Principle: Semi-automatic gravimetric (weight-based). The operator places empty buckets on the two platforms and initiates the cycle. The system uses high-precision load cells to determine the container’s mass, then activates product supply through shut-off nozzles. Filling stops when the set target weight is reached, after which the buckets are conveyed to the capping head.

• The Heart of the System: Dual Gravimetric Platform: The core of the line is two fully independent weighing cells (load platforms). Each has its own weighing accuracy (typically within ±5-10 grams of the target weight, depending on volume), guaranteeing identical filling of both containers and the complete absence of «underfills» or «overfills,» saving your raw materials.

• Unique Feature: Roll-Under Dosing Station: This module includes dosing pumps (piston or diaphragm, depending on viscosity), shut-off valves, pipelines, and a control panel on a separate wheeled frame. For cleaning or maintenance, it is sufficient to disconnect quick-release couplings and roll the station aside, taking minutes instead of hours of downtime.

• Filling System: Two shut-off nozzles with pneumatic or solenoid control, ensuring sharp flow cutoff and preventing dripping of viscous products. Configuration with self-cleaning (blow-through) nozzles is possible.

• Capping System: A powerful pneumatic driving head mounted at an angle. It works in tandem with an overhead pressure conveyor that secures the bucket and its lid during sealing, ensuring a perfectly even and airtight lid seating across the entire perimeter, even if the lid is deformed.

• Conveyance System: A powered chain or roller conveyor with separate zones for container placement, filling, capping, and discharge. Conveyor speed is adjustable.

• Materials of Construction: Frame and structure – painted carbon steel. All product contact parts (nozzles, tubes, pumps, valves) are made from AISI 304 or AISI 316L stainless steel, ensuring corrosion resistance and compliance with basic hygiene standards. For aggressive chemicals, specialized coatings or plastics can be applied.

• Control System: A central control cabinet based on a Programmable Logic Controller (PLC) with a touch-screen Human-Machine Interface (HMI). The interface supports multi-language menus (English, Arabic, Spanish, etc.). Dozens of recipes with parameters for weight, speed, and time for different products can be stored in memory.

Detailed Analysis of Advantages and Problems Solved

1. Dual Productivity: Simultaneous filling of two buckets reduces the total packaging cycle time by more than 40% compared to sequential filling, allowing for faster completion of large orders and optimization of operator labor.

2. Uncompromising Accuracy, Independent of Product Properties: The gravimetric (weight-based) method is the «gold standard» for viscous and foaming liquids. Unlike volumetric dosers, weighing accuracy is not affected by batch-to-batch changes in temperature, density, viscosity, or the presence of air bubbles. This guarantees strict compliance with the declared label volume/weight and prevents financial losses from overfilling expensive components.

3. Revolutionary Ease of Maintenance and Product Changeover: The roll-under station transforms the routine and messy task of flushing into a quick and clean procedure. This is critical for manufacturers working with different paint colors or chemically incompatible products (e.g., water-based and solvent-based primers). Reducing downtime between batches directly increases Overall Equipment Effectiveness (OEE).

4. Reliable and Neat Capping: The angled driving head with a pressure conveyor creates a perfectly even and tight connection between the lid and the bucket. This prevents leaks during transportation and storage, protects the product from drying out or contamination, and ensures a professional appearance, which is especially important for B2B supplies and strict distributors.

5. Enhanced Operator Safety and Environmental Friendliness: The enclosed design of the dosing units and the possibility of easy local washing of the mobile station minimize operator contact with chemicals and fumes. This promotes compliance with occupational health and safety standards (especially in markets like the Middle East and Southeast Asia, where this is receiving increasing attention) and reduces wastewater volume.

Target Industries and Expanded List of Typical Products

• Paints & Coatings Industry: Acrylic, alkyd, epoxy primers and paints; interior and exterior emulsions; anti-corrosion coatings; wood stains and varnishes; automotive enamels (in repair kits).

• Construction Chemicals & Sealants: Polyurethane, acrylic, and silicone sealants; construction adhesives (for tiles, PVC, foam); liquid waterproofing materials; fillers and leveling compounds in liquid form; cartridge foams (before filling).

• Industrial Adhesives & Compounds: Solvent-based adhesives; two-component epoxy resins (component A or B); contact adhesives; polymer mastics.

• Specialty Chemicals: Antifreeze and coolants; concrete treatment agents; high-viscosity oils and lubricants; agrochemicals (liquid fertilizers, pesticides).

LFSG-500 with Roll-Under Station vs. Standard Solutions

💡 Mention your: Target market (EU/US/Global South), Active ingredient, Required throughput.

🔬 Schedule virtual factory acceptance test with our engineers.

🏷️ Request Compliance Audit: Free gap analysis with throughput simulation.

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