Wherever concrete is produced and moved is where you will find Schwing-Stetter machinery. With plants in Germany, Austria, USA, Brazil, Russia, China and India as well as with more than 100 sales and service facilities, the group of companies is always close to the customer.
Our wide range of products with something for every application is what makes Schwing-Stetter the No. 1 system supplier for concrete machinery worldwide.
Stetter horizontal concrete mixing plants HN 1.5 – HN 4.0 and H 5 – H 6 incorporate the experience of over 45 years in mixing plant technique.
Depending on the requirements, the HN-type series is equipped with pan mixer or twin-shaft mixer. While designing the plant, high importance was attached to the access thereby facilitating maintenance. In addition, the generously dimensioned space allows this plant to be offered in a wide variety which can be taken from a modular system. H 5 – H 6 are plants for mass requirements, which can be suited to the individual demands by adapting the design.
The HN-plant can be supplied completely mounted in our works or as partially assembled unit, e.g. for export with locally manufactured components.
HN 1.5 – HN 4.0 have been designed as stationary plants or as semi-mobile plants without foundation.
If four or more types of aggregates are used, they can be stored in an in-line silo. Each aggregate component is kept in a steel or a concrete silo provided by the customer. An intermediate storage facility can also be built if the aggregates cannot be delivered at short notice for large concrete requirement. Weighing of aggregates is done on a weighing belt appropriate for calibration. The belt conveyor feeds and transfers the aggregates into the feeder skip of the mixing plant as soon as the weighing process has been completed. The in-line silo compartments are fed by wheel loaders or belt conveyor equipment.
As an alternative to a complete delivery of the plant, the modular concept also allows the supply of locally manufactured components, such as in-line silo, cement silo, plant housing platforms, stairs, etc. Due to this possibility, the transport cost and customs duties can be reduced and the relatively lower procurement cost level of some export countries can be made use of.
Sinking of the in-line silo into a pit is economically worthwhile. The required ramp becomes extremely short or is not necessary at all. The space required is less, and in addition the operating costs for the wheel loader are reduced. In winter operation, the pit execution decreases the expense for works’ logistics, and heating of the in-line silo becomes considerably cheaper.
Should the aggregates be fed to the plant via an inclined belt conveyor, the entire skip equipment of the plant is not needed. In this case, an in-line silo with four or more aggregate compartments is placed in front of the inclined belt conveyor. Batching of the aggregates is done via a weighing belt appropriate for calibration. The weighing belt feeds and transfers the aggregates onto the inclined belt conveyor as soon as the weighing process has been completed. The inclination angle to the mixing plant is between 16° and 24°. The aggregates are transported by the inclined belt conveyor into an intermediate storage hopper above the mixer. From there they fl ow directly into the mixer via a fl ap valve.
Stetter pan mixers guarantee production of quality concrete in all slump ranges as they mix intensively, thanks to short mixing paths both horizontally and vertically.
Therefore, homogenous concrete is produced with Stetter pan mixers with short mixing times and low energy input.
The mixing tools of the Stetter pan mixers are laid out to experience extremely low wear. The spring-mounted mixing arms can be adjusted quickly and without difficulty and are protected against wear by polyurethane sleeves. Upon request, our mixers can also be made available with shovels made of syntethic material for particularly long lifetimes instead of the standard mixing shovels made of special chilled cast iron.
The mixing trough is lined with replaceable wear plates on the inner and outer wall as well as on the mixing trough bottom.
The mixing trough bottom can be lined either with normal wear plates made of special steel or special chilled cast iron tiles, depending on the characteristics of the aggregates to be handled. The wear plates on the bottom can be turned upside down. Due to all these sound characteristics we have been able to extend the lifetimes of our mixers considerably.
The pan mixer can be equipped with up to three hydraulically actuated discharge gates which are driven by the mixer motor.
The dustproof mixer cover can be opened up to 70 % for maintenance and cleaning. Available as additional equipment are steam injection and high-pressure cleaning systems.
Excellent mixing effect with short mixing and discharge times, a wide range of applications as well as low wear: these are the characteristics of Stetter twin-shaft mixers – trough mixers in compact design with two mixing shafts rotating against each other made of high-strength heat-treated steel. Thanks to Stetter’s heavy-duty mixing unit, an intensive agitation of the mixture is reached resulting in fast homogeneity of the mixture. The new compact drive concept offers numerous advantages in daily operation. At first there is the easy access to all components of the mixer for maintenance and repair. And, thanks to the monobloc design with motor and gearbox forming one unit, misalignments and deviations in angles between the axles cannot cause problems.
The mixing arms, made of high-quality cast steel, are arranged on the two hexagonal mixing shafts in a spiral shape. A large overlapping of the tools and a low filling factor were envisaged. An intensive exchange of the mixture is guaranteed together with the flow-supporting blade configuration. Moreover, the low peripheral speed and the special design of the mixing tools as well as the application of high-quality cast material provide for a long service life of the wear parts. Even more: the mixing shafts are sealed towards the interior with a slide ring seal. An automatic grease lubrication system can be supplied for these four slide ring seals as an option.
Durable spherical roller bearings are used for the mixing shafts. The bearings are arranged outside of the shaft sealing and accommodated in a separate housing. All these features result in low maintenance requirements and save time and cost. Optionally available: a special mixing unit for coarse grain for production of dam concrete. This enables the use of aggregates up to a grain size of 180 mm.
these are the advantages you receive, thanks to the compact modular system of Stetter horizontal mixing plants:
1. Fast erection
2. Accessibility all around
3. Very spacious and convenient mixer and weighing platform
4. Clear arrangement and ease of maintenance
5. Optional supply of a mixer ventilation filter
6. Optional supply of a mixer cleaning system
7. Optional supply of an ice weighing system
8. Optional supply of a powder weighing system
9. Optionally available with housing
10. Optional supply of a camera system for the mixer
11. Optional foundations for the complete plant for semi-mobile application
Live chat with our professional customer service! Get the quotation list.Chat Now