Liebherr is exhibiting its rugged truck mixer design, which features a novel sub-frame concept that extends working life and uses the latest Mercedes Actros truck chassis
Most of the major manufacturers of extraction and crushing equipment worldwide will be present at the upcoming Hillhead show, either directly or through local distributors
Set in a working quarry, the Hillhead exhibition has set a lead for the quarrying sector. An industry only show, the event is being held this year at the Hillhead Quarry, Buxton in the UK on 22-24 June.Pre-show bookings are strong while the event has attracted strong industry interest from exhibitors. This is an industry show and is not open to the general public, being aimed at quarrying professionals only. It is run by the UK's quarrying association, the Institute of Quarrying, through its magazine Quarry Management.
Most of the major manufacturers of extraction and crushing equipment worldwide will be present at the show, either directly or through their local distributors. The key machines on show will include excavators, wheeled loaders, rigid and articulated dumptrucks, primary and secondary crushers, hydraulic breakers and screening plant. Because of the quarrying industry's close links with the concrete and asphalt markets, manufacturers of concrete and asphalt plants as well as asphalt pavers will also be exhibiting.
Power for the 1221E comes from an 11litre
Features include front and rear axles with limited slip differentials, oil-cooled disc brakes and a large ergonomically designed cab, as well as a rugged Z-bar loader linkage.
Meanwhile the firm is also showing its compact 721EXT, 821EXR and 921E wheeled loaders on static display. These machines are suited to stocking and rehandling duties, as well as heavy duty extraction at the quarry face. The larger CX470B will demonstrate the Case commitment to heavy excavation duties, providing a match for the 330ADT that completes the static display line-up.
At
The Mobilmix 2.25 is a mobile horizontal plant which, offers high output and is of robust modular construction. This machine can be transported on only a few vehicles and has easily assembled components for fast, safe erecting and dismantling. With all modules fully integrated, and the entire plant with aggregate hoppers and cement silos on their own steel foundations, the Mobilmix 2.25 can be installed quickly with minimum ground preparation and can be ready to batch within a few days of delivery to site.
It features a twin-shaft mixer with production capacities of up to 100m³/hour.
Other features include Liebherr's wellproven Litronic MPS II microprocessor control, installed in its own integrated module, regulates and monitors the plant's operation, moisture and temperature measuring devices are included, together with an admixture weigher. The configuration chosen for the Hillhead show features four aggregate/sand hoppers, two 100 tonnes capacity cement silos and a standard 2.25m³ twin shaft mixing section with admixture dosing and pumping facility.
The Liebherr HTM series truck mixers feature drums made from special steel with wear protection on the mixer spiral blades.
For the HTM 804P, the geometric drum volume is 14.3m³ and the capacity in set concrete is 8m³; water volume is 9.1m³. For the smaller HTM 704P, the geometric drum volume is 12.34m³, the capacity in set concrete is 7m³ and water volume is 7.7m³.
According to the firm, an important feature of its machines that extends the working life of the mixer drum and the truck chassis is the novel high-quality steel frame and Uclamp fixing method. The drum supports are fixed to the sub-frame with stirrup bolts that allow flexing under load. These are fitted close to the frame to avoid stress transference and to distribute loads uniformly. This allows the mixer sub-frame to be fixed securely to the frame, while allowing the body to flex and avoid stress damage or misalignment within the mixer superstructure.
