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The DW twin shaft mixer is the best mixer for ready-mix producers. It allows mixing concrete recipes with aggregates with mesh up to 150 mm, which means it fits perfectly when there is fiber in the recipe, or pigmentation, also for CCR, or rigid pavement in highways.
April 2021 Issue
Even for projects that have a high concrete demand, like infrastructure projects, the DW mixers are very flexible and used for several types of mixing design. Liebherr has several worldwide success cases starting from a single plant in a ready-mix producer with smooth operation, as well as being present in some precast factories and in big infrastructural construction sites.
Being in the most competitive markets, Liebherr not only offers the mixer, but also guarantees a good and a reliable operation with less time of stopped machine, and easy maintenance work.
The DW gearboxes were designed to have high efficiency (approx. 96% while conventional gearboxes offer approx. 85%), and optimum energy input into the mixing material in order to achieve the best mixing results within shortest times.
An optional feature is a high-pressure cleaning system for fast and easy maintenance, making the cleaning time shorter allowing upkeep during the day.
In regards to mixing quality, the Liebherr twin-shaft mixers have the mixing arms at a 60° arrangement offering a main zone region between the mixing shafts, which results in the best quality within the shortest time possible.
The large cover offers an easy and safe maintenance operation, maintenance can be conducted comfortably inside the mixer. The covers safety sensor isolates the mixer when opened and there is an option to add a safety switch in the mixing platform.
The DW mixers have a long-life cycle because its design includes:
- Improved ventilation for continuous cooling
- Mixing tools have improved wear properties with longer life cycle
- The V belt, which is low maintenance, avoids damages to repeated mis-adjustments
- Reduced loads on the bearings in the gearboxes
- A manual hydraulic pump as a standard solution that allows discharging material without power in case of power loss during operation.
Find out more about Liebherr DW twin shaft mixer.
The anatomy of the DW twin shaft mixer
Powertrain
An efficient powertrain with a Liebherr planetary gearbox. It has maximum energy input into the mixing material achieving the best mixing results within the shortest times.
Mixing Tools
With an ideal speed for mixing tools for best homogeneity in the shortest time, the intertwining mixing arms are arranged at 60° for the maximum strength during mixing.
Mixing Trough
Designed for high loads, it is very resistant, offering a long lifespan and longer replacement intervals of the wear tiles. This results in a reduction of maintenance work.
Hydraulic System
The hydraulic mixer gate is equipped with an additional oil pump for cooling the gearbox rinse, and an extra manual pump in case of power loss when the mixer is filled to avoid disassembly of the hydraulic system.
Sealing
Labyrinth sealing in separated design.
Central Grease Unit
Central grease unit with Liebherr special grease (CTK) and automatic discharge controlling. It provides ideal sealing (labyrinth sealing) and maximum protection of wear parts (bearing). Furthermore, having permanent lubrication in short cycles will increase the life cycle and reduce the maintenance of the mixer.
Mixing Cover
For safety it has control of the keyless locking system affixed in the on-site operation. Due to the large opening, maintenance can be conducted comfortably inside the mixer, it saves time and costs by reduction of the service works.
Product Brochures
Download product brochures below.
DW Twin Shaft Mixers
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