The «tarolo» is no longer a problem, thanks to this super Breton machine

The «tarolo» is no longer a problem, thanks to the Maxi super machine bought by SAGEVAN: today Michelangelo wouldn't have to fill the veins in his David with white "stucco"

FIGHTING BACK AGAINST THE CRISIS: THE FLAW IN MARBLE CORRECTED BY AN AUTOMATED BRETON MARBLE POLISHING MACHINE

by GUIDO BACCICALUPI

The veins called “TAROLI” in marble that drove even Michelangelo mad as he had to fill the block of marble used for the sculpture of David with lime mortar, are no longer a problem for our quarries thanks to a new super machine. 

SAGEVAN a Gemignani and Vanelli company and one of the biggest in the Carrara district, raised the bar on quality by investing in this “jewel” in the Breton crown, which not only doubles production output, but also means a remarkable increase in the quality of marble slabs used in coverings and architecture. 

The machine, worth almost 2 million euros, was unveiled Friday evening at the new SAGEVAN works in the Asi (ex Coke) area located in viale Zaccagna (Carrara), in a ceremony attended by the Mayor of Carrara Angelo Zubbani (who remarked “a wave of optimism in these difficult times”), the Deputy Mayor Andrea Vannucci, the President of the Industrialists Association Giuseppe Baccioli and the Provincial Councillor for Productive Activities Paolo Baldini. 

A well-polished works where you can't help but notice this giant “masterpiece” of engineering, fully automated with the operator controlling the resin application and polishing from the console. Like a DJ at the controls of a disco. Great progress has been made also in terms of safety: when the marble slabs are being polished no one can approach the machine and a photocell detects any intrusions, causing the system to stop. 

“We went against the general trend — explains architect Egidio Marino, one of the owners of the company — and in a time of crisis we invested considerable resources in a machine  that solves one of the biggest problems with marble slabs, the so-called "tarolo", a small cavity that decreases the value of the material because if the veins aren't treated properly in time they absorb dirt and the surface will become darker. This machine uses sophisticated technology based also on a UV oven catalysation system. A protective film is applied to the surface with the "taroli" then the slab is polished to perfection."

SAGEVAN employing around thirty people, is in the Calocara district where it gets and processes its marble: “Our customers must come and see the products — adds Marino — added value for the local product. We've installed a digital system to take high-definition photographs of our materials." “We just finished supplying White marble slabs for covering a skyscraper in Central Park, right in the heart of New York. Thanks to architecture, our marbles are more and more popular — emphasizes Manrico Gemignani, one of the company shareholders — but you have to offer a product of the very highest quality." The new machine can produce up to 1,000 square meters of slabs per day. 

SAGEVAN is specialized in the production of slabs made of the typical white and “coloured” marble obtained in the Calocara A-102 Quarry: marbles of a high ornamental value such as the Statuario Venato, Calacatta, Paonazzo and Paonazzetto as well as marbles with excellent technical-aesthetic qualities such as the Statuarietto, Venatino, Bardiglio and Carrara White.

Written by La nazione Massa Carrara  
06.10.2012 

Sergio Prior

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Smart-Cut 800 SPECIAL bridge saw for working huge concrete panels

Hello,

I have received other photos about our special CNC bridge saw Smart-Cut 800 while it was working a huge concrete piece.

For more INFO click here.
By-by
Sergio Prior

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New Levibreton KFT line for polishing marble

Good morning,
Today I’d like to show you a new polishing line for marble slabs we recently installed by one of our customers, SA.GE.VAN of Avenza - Carrara (Italy).

This line has a production capacity of approx. 1.200 m2 per shift and polishes marble slabs with a maximum size of 2050x3300 mm.
Once loaded on the line, the slab is first trimmed crosswise (leading/trailing end) and then lengthwise.

The slab is then polished on the Levibreton KFT with 8 spindles, dried and heated to remove any residual humidity.
At this point, the slab is automatically filled and exposed to UV rays so that the filler gelates and shrinks allowing for the manual addition of some more filler.

The filler is catalyzed under the kiln and the Levibreton KFT with 14 spindles completes the slab polishing process.
The dried slab is conveyed to the automatic waxing and application of a polyethylene sheet, to be lastly unloaded on the A-frame.

Automatic slab loader

Longitudinal trimming machine

Polishing machine Levibreton KFT with 8 spindles

Cleaning unit

Radiant units

Automatic void filling machine

Slab filling

Polishing machine Levibreton KFT with 14 spindles

Automatic waxing machine

Automatic equipment to apply a protective film

 Special comb-shaped conveyor

Automatic slab unloader

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By-by
Sergio Prior 

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Breton BESTWIRE - Single-wire machine for squaring blocks and cutting slabs

Breton BESTWIRE

MACHINE STRUCTURE AND MECHANISMS

Heavy-duty, heat treated arc-welded steel structure ensuring the required stiffness of the system and cutting precision of the machine.
Two opposite carts containing the components for the wire motion, slide vertically along the machine columns by means of screw/nut screw mechanisms, thus moving the wire up and down.
The wire is rotated by a large diameter driving pulley, which is actuated by belts and in-verter controlled asynchronous motor, in order to optimize the wire peripheral speed according to the material to be sawn.
Another large diameter driven pulley is constantly kept under tension by a pneumatic cylinder, thus giving the wire the ideal tension.
The mechanism is completed by two upper, independent driven pulleys and two wire-driving pulleys installed next to the point where the wire gets into, and comes out from, the block to be sawn.

LUBRIFICATION
A manually operated lubrication system provides lubricant to critical points.

PAINTING

In order to ensure a high corrosion strength, both the structure and the components are first sand-blasted to prepare the surface before painting, then coated with a zinc-based epoxy primer and lastly with a second bi-components top coat.

PULLEY COATING

All pulleys are coated with special, interchangeable, wear-resistant elastomer profiles.

SAFETY MEASURES   

A special sensor, connected to the stretching cylinder, detects any possible breakage of the wire and stops the machine instantly.

AUTOMATIC ADJUSTMENT OF THE WIRE LOWERING   

When cutting, the wire lowering speed is automatically managed by the machine control system through sensors, which detect the position of the stretching piston.

POSITIONING ACCURACY OF THE BLOCK-HOLDING TROLLEY   

The block-holding trolley has four motorized wheels, which are installed on rugged bearings. Wheels are provided with a special profile acting as a guide along the rails that are fixed to the foundations so as to obtain a perfect parallelism. The system ensures an accurate positioning of the trolley and a precise parallelism of cuts, thus enabling to cut slabs (even thick slabs) with the precision typically required by this type of operation.

PROGRAMMING

The colour touch-screen and user-friendly software ensure a simple programming, con-trol of the cutting cycle and management of the working axes. A mobile button panel makes the activation of the main working axes easier for the operator.

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By-by
Sergio Prior

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NEW Breton polishers Levibreton KFG for marble

Hello,

Can you tell me what’s behind this mirror-polished slab?

You can hardly see it: it’s the new high performance polisher Levibreton KFG for marble.

 

This polishing line is installed at Stocchero Attilio's, in Volargne (VR),  one of our long-time customers who is very satisfied with the two new Levibreton KFG.

The first Levibreton KFG has 9 spindles and dresses marble slabs.

The maximum speed of the mobile beam is no less than 70 metres/minute.

Deriving from the design of the renowned polisher Levibreton KG for granite, which has a heavy-duty structure, specially dimensioned for granite, Levibreton KFG boasts a very high productivity.

The second Levibreton KFG has 15 spindles and polishes marble slabs to perfection.

The new standard Levibreton KFG can be supplied with 11 and 18 spindles.

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By-by
Sergio Prior
 

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