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Automated Vacuum Conveying Systems Optimize Extrusion Feeding Processes

2026-11-01

Precise material feeding is a critical step in extrusion processing, where consistent dosing directly affects product quality. Manual feeding methods are generally slower and carry risks of operator error and contamination. As manufacturers pursue greater automation, enclosed pneumatic conveying systems are emerging as a practical alternative.

Automated conveying addresses feeding accuracy

The Volkmann VS pneumatic vacuum conveying system illustrates the approach. It uses vacuum pressure to move materials in a pulsed mode, transferring powders and granules from storage areas to the extruder at a preset weight or volume.

Compared with manual handling, the enclosed automated system reduces exposure to moisture, contamination and formulation errors, while maintaining a steady and continuous material flow.

Flexible configurations for sensitive production

The system is designed for industries with high hygiene requirements, including food, pet food and nutritional products. It can convey material from multiple sources—such as bulk bag unloaders, feeding stations, silos or bins—to a single extruder or continuous mixer.

Because conveying is enclosed, sensitive materials are not exposed to the production environment, helping maintain plant hygiene standards.

Gentle handling protects material integrity

Handling fragile or irregularly shaped ingredients requires controlled conveying. The Volkmann VS system can transfer materials ranging from fine sugar powder and salt to larger items such as chocolate chips, nuts and berries.

In the closed vacuum system, material moves through the pipeline in plug form, reducing mechanical friction and preserving physical integrity while maintaining throughput.

System specifications

The specifications below summarize the system’s material-handling range and conveying method.

Characteristic	Description
Material types	Powders, granules, food additives and similar materials
Minimum particle size	0.1 µm
Maximum particle size	Several inches (e.g., nuts, berries)
Conveying method	Pulsed vacuum conveying under negative pressure

Frequently Asked Questions

Can pneumatic conveying damage fragile food ingredients?

The system uses a gentle vacuum process in which material moves steadily through the airstream. This makes it suitable for fragile items such as chocolate chips and nuts, and the material’s physical integrity is maintained during transfer.

Does the system support multi-point supply?

It supports multi-point supply. The system can connect to bulk bag unloaders, silos, feeding stations and other sources, collecting multiple ingredients and conveying them precisely to a single extruder or mixing device.

How is suitability for a specific material verified?

Material suitability is evaluated through controlled trials at a dedicated test facility, where performance can be assessed through on-site observation or a live remote demonstration.

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