Secondary processing
Tumbling
KVM delivers in-line tumbling systems as well as offline systems. The KVM Tumbling Systems are characterised by:
- High output
- Simple operation
- Easy product change
- Automatic quality changing
The systems handle all types of pavers, big blocks and split faced products. Products are tumbled in heavy duty drums with rubber lining.
KVM Inline Tumbling Systems are adapted to handle products only 24 hours old. The systems can tumble and cube the volume from the smallest block machine to the massive flow of products from a big board KVM block machine with a capacity of more than 375 m2 per hour.
Inline Systems can also be adapted to handle products directly from an Inline splitting system, giving a unique product with minimal need for operators.
The KVM offline system is used by producers with the highest demands for quality and flexibility. The off-line system gives the possibility for mixing pavers with up to four different colours with customer adapted variations. The off-line system is build up around a KVM cuber and automatic quality sorting. The cuber feeds the pavers to the drum, handles the transport of pallets and cubes the finished products.
This system has a capacity of approx. 100 m2 per hour in an unmanned setup. The tumbled products can also be cubed by a draw plate stacker capable of handling very thin pavers and all types of wall products including split faced. The KVM Tumbling Systems are all controlled by state of the art PLC control systems backed up by our standard 24/7 online service system.
Splitting
These value added features give producers the flexibility and reliability they have been looking for:
- 4 way splitting of products
- 40–250 or 250-450 mm product height
- Splitting width max. 1200 mm
- Fast cycle time: 10-20 cycles pr. minute*
- Easy snap blade change
- Very accurate height control prevents marked products
- Multi blade knife system
- Very stable frame system
- Infeed with chain conveyor or pusher with variable frequency drive
- Splitting force: 90 ton
- 22 KW hydraulic power pack
- Allen Bradley programmable controls with on-screen menu selection
- Formatting table and organiser available
Washing
Washing the surface with a gentle mist of water almost creates a jewel out of an ordinary paving stone or a concrete slab.
With the KVM soft washing machine you can extend your range of products with pavers and slabs which have an unmistakeable nature and so new markets open up, the washing depth is 2-3mm. If larger stones have to be exposed, the KVM hardwash is the solution with a washing depth of 4-8mm.
Insulation blocks
Insulated blocks is today mostly produced directly in the blockmachine by inserting insulation material into the mould before casting. This method is both complicated and time consuming.
KVM has developed a new method were the combination of block and insulation material takes place independently from the blockmachine. The process is based on gluing block and insulation material together. This has the advantage that it allows the blockmachine to operate at full capacity and it makes it possible to use other materials. The full automatic line can keep up with the capacity of a very large blockplant while at the same time doubling the capacity of the blockmachine.
Ventilation bit dispenser
Efflorescence, white areas on product surfaces, has for years been a problem for producers of slabs and pavers.
Customers do not like the white spots on the surface. Especially on black and darker coloured products. This is the reason for many complaints from endusers. The KVM Ventilation Bit Dispenser is an effective weapon and reduces the problem. It automatically places a plastic Bit in each corner of the product providing air between the layers of the products in the stack, and thus the water content in the product is reduced and also the efflorescence. The bits also protects high value slabs from transport damage. The Bit Dispenser is placed on the dry side between the curing area and cuber.
The unit can place variable numbers of bits on the product and the location on the product is also variable. The Bit Dispenser is controlled from a touch screen and the control system is provided with memory, which can store location of the Bits on each product. The Ventilation Bit Dispenser is an independent unit that can be installed in new plants as well as integrated into existing ones.
Ventilation sand dosing
Efflorescence, white areas on product surfaces, has for years been a problem for producers who make slabs and pavers. Customers do not like the white spots on the surface. Especially on black and darker coloured products. This is the reason for receiving many complaints from the end-user. Efflorescence is caused by a combination of circumstances: soluble salts in the material, moisture to dissolve the salts, and vapour transmission or hydrostatic pressure that moves the solution toward the surface. Water in moist, hardened concrete dissolves soluble salts. This salt-water solution migrates to the surface by vapour transmission or hydraulic pressure where the water evaporates, leaving the salt deposit at the surface. Particularly temperature, humidity and wind affect efflorescence.
In the summer, even after long periods of rain, moisture evaporates so quickly that comparatively small amounts of salt are brought to the surface. The new KVM Ventilation Sand Feeder is an effective weapon against the problem. It places an adjustable amount of sand between the layers of products in the stack, and thus reduces the efflorescence. The unit can be used for all types and sizes of concrete products.
The sand is dosed automatically by vibration feeding on the products before cubing.
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