Multi-Ingredient Dosing with a Single High-Precision Weighing Unit

In industrial production lines requiring complex recipes, numerous raw materials, and high accuracy, classic dosing architectures can sometimes fall short. VOLDE in-motion weighing-hopper batch dosing systems are advanced gravimetric dosing solutions in which a single high-precision weighing unit moves between multiple feeding points to perform dosing. This architecture reduces the number of pieces of equipment while enabling a large number of raw materials to be weighed with high accuracy. It is particularly preferred as a premium solution in refractory dry mix, thermal insulation blending, foundry core sand, and specialty chemical compound production lines.

| In-Motion Weighing and Dosing

In-motion weighing-hopper batch dosing is a gravimetric weighing method in which a single weighing unit moves along a linear rail or circular rotating platform, positioning itself under each raw material station in sequence and taking a dose from there. Unlike classic systems:

• The raw material stays fixed while the weighing unit moves (in classic systems, weighing is fixed and the raw material circulates)
• 10–30+ raw materials can be weighed with a single weighing unit
• Minimal mechanical tolerance errors (weighing from a single cell)
• Flexible layout — adapts to the physical constraints of the project site

| In-Motion Weighing Architecture

In the system, the weighing hopper moves on a linear rail system or circular rotating platform and positions itself under each raw material feeding point in sequence.

• Classic Weighing Hopper: General powder/granule dosing
• Steel Bucket Form: Physically transporting the raw material directly to the mixer
• Big Bag Suspendable Frame: Direct weighing into a big bag for large-volume recipes

Each feeding station has its own cutoff gate, dosing screw, and coarse/fine dosing control equipment. Once the weighing hopper is positioned, the relevant station becomes active and dosing is carried out up to the target weight.

| Operating Principle

In in-motion weighing-hopper systems, dosing is carried out entirely in a sequential and controlled manner:

• The weighing hopper moves to the first raw material point under PLC control
• Rapid approach to the target weight using high-flow-rate feeding
• Precise weighing in low-flow-rate mode as the target is approached
• Feeding stops once the tolerance range is reached
• The weighing hopper automatically moves to the next raw material station
• The batch is ready once all raw materials in the recipe have been weighed

| Why an In-Motion Weighing-Hopper System?

The in-motion weighing architecture offers advanced advantages compared to classic central weighing or linear systems:

• Multi-ingredient weighing with a single weighing unit
• Compact system architecture with fewer pieces of equipment
• High measurement stability and repeatability (single load cell)
• Flexible discharge and conveying options (physical + pneumatic + intermediate hopper)
• Fast adaptation to recipe changes
• Low long-term maintenance and calibration needs

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Batch Dosing Systems

| Which Industries Is It Used In?

VOLDE in-motion weighing-hopper batch dosing systems are preferred in processes involving complex recipes and a large number of raw materials:

• Mineral — Refractory: Preparing refractory dry mix containing 16+ abrasive minerals
• Mineral — Thermal Insulation: Blending lightweight perlite, vermiculite, and binders
• Mineral — Casting: Weighing 10+ different sands and additives in core sand recipes
• Construction Chemicals: Multiple raw materials in plaster and mortar recipes
• Chemical — Specialty Compound: High-precision recipes for niche chemical formulations
• Food — Premix: Multi-component food additive recipes with small quantities