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Saturday, May 2, 2015

Industrial Hemp Processing Machinery

Bast Fibre Processing Pneumatic Transport and Filtration

Design and Production of :

Complete processing lines for natural fibres (flax, hemp and kenaf).

Pneumatic transport and dust extraction systems for natural and synthetic fibres, paper and card board waste, insulation material, hygienic products, wood, etc...

Engineering: A team of enthusiastic engineers for the development and innovation of all our products.

Manufacturing: Work shop with highly skilled metal workers who build the machines.

Assembly: Experienced mechanics travelling all over the world for the assembly and start up on site.

Company Structure:

Bast Fibre Processing

Flax Scutching

Core Cleaning

Pneumatic Transport Systems


4 8 10 12 16




Bast Fibre Processing

Separation of fibre and core from hemp, flax or kenaf

Processing line with capacity of 6 to 8 tons per hour of raw straw at the entry of the line. A line for 3 to 4 tons per hour is also possible.

Turn key project including electrical controls, bale handling equipment, assembly of the line and start up on site

Important aspects for good processing are:

• Length of straw at entrance: Ideally 400mm (Max. 600mm)

• Moisture content: Flax and Hemp 12-18%; Kenaf 18-25%

• Straw quality: Fibre percentage of input material ±25%

• Straw condition: Slightly retted to a gold or light-grey colour

• Stalk diameter: not higher than 20mm

First section of the line: Opening & Decorticating of the straw

Output fibres with approx. 15-20% of core (‘paper quality’)

Short Fibre Baling

Online Transfer to Refining Lines

Core Buffer Container

Dust Filter Extraction


Refining Lines


Core Cleaning

Buffer Silo for Core

Mineral Dust Treatment

Bale Opening

Dust Briquetting

Pallet Robot + Handling

Wrapping Unit

Decortication with Decorticators Section

and Fibre Balers

Fibre Separators


Air Separators for Pneumatic Transport & Feeding of Fibre Material

Clean Fibre Baler

Bast Fibre Processing

Further cleaning of the fibres up to a point where they contain less than 5% of core (‘technical fibres’)

The clean fibres are ready for further processing, for example in the automotive, non woven or furniture industry. New applications in composite and construction material are also gaining interest.

Online transfer from the decorticating section to several refining lines

Fibres are baled after refining

Conveyor for Manual Feeding of Fibre Bales

Entrance of Refining Lines

Hopperfeeder to Open Fibre Material and to Form a Regular Layer Towards the Refining Lines

Bast Fibre Processing

Cleaning of the core material (removal of short fibres)

The clean core can be used as stable bedding or in construction material

The wooden core of a bast plant is also called: Shives (North America), Shivs United Kingdom), Hurds (Australia), Wood (Netherlands), Anas/Chènevottes (France) or Schäben (Germany).

Pressing in bags or storage in bulk

Dust extraction for the complete line with filter units in negative pressure.

Separate treatment of mineral and organic dust.



Divider (Increase of Flax Layer Speed)

Ripping Comb for Removal of Seed Balls

Entrance of the Line (Unrolling of Flax Bales)

Scutching Turbine for Long Fibre Flax

Capacity of 3.000tons per hour (good quality flax)

The scutched flax is ready to be combed (heckled) and processed further into yarn and eventually into linen textiles.

Van Dommele builds complete scutching lines but also equipment to clean the by- products such as the core, the tow (or short fibres) and the seed.

Aspiration of Shives

Scutching Turbine

Aspiration of Tow

Primary Seed Cleaning (Shaking Unit)

Breaking Units

Scutching Elements for the Top Part of Flax Stems

Scutching Elements for the Bottom Part of Flax Stems

Transfert Unit

Exit of the Line (Final Quality Check)

Baling Press for Scutched Flax

Scutching Turbine

Differents sections in the line:


• Opening of the bales (+ aspiration of the seed)

• Breaking of the stems (+ aspiration of the shives)

• Scutching of the fibres (+ aspiration of the tow)

• Baling of the scutched long fibre flax


Core Cleaning

Removal of impurities such as short fibres, seed, dust and rocks.

Various possibilites; duvex separators, shakers, drum sieves, zig zags, etc.

Depending on the required capacity a detailed cleaning system is designed.

Removal of the dust is in many cases achieved using pneumatic transportation over air separators.

Flax Shive Cleaning Duvex Seed Separating Equipped with


Fibre (Fibres Exit

go to

Removal with Screw of Clean Conveyors


a Baling Press)

BigBag Filling Station for the Seed

Separating of Seed (Small Shives are Aspirated

to a Cyclone)

Inclined Shaker


Drum Sieve

Air Separator for Material Discharge (and Dust Removal)

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