Fabrication case study: Automated enhancement of granite slabs

Marmi Lanza of Verona, Italy, has implemented equipment to automatically apply resin and fully polish granite slabs. The slabs are treated with epoxy resin, which is manufactured by Tenax to reinforce and protect the slabs, in conjunction with a superficial treatment named Pectro applied at the end of the polishing process to hide small imperfections naturally present in the granite. In addition, the company also reports that the resin enhances the natural appearance of the stone.


Buffing units on the machine bring out the polish of the stone.
Given its rich history in stoneworking, the Verona region of Italy has long been home to innovations in stone fabrication. Fabricators in the area have found new methods and improved ways of implementing older procedures. One such case can be found at Marmi Lanza, which has invested in a new line to automatically apply enhancing resins to stone slabs.

The epoxy resin, which is man-ufactured by Tenax, is used to reinforce the surfaces of the slabs. The company also uses Pectro, another product manufactured by Tenax. This product is applied at the end of the polishing process to hide small imperfections naturally present in the granite slabs. The company also reports that both treatments enhance the natural appearance of the stone.

After rough slabbing of the blocks, the slabs move through a Gaspari Menotti slab polishing line that brings the surface of the slabs to a 220-grit honed finish. Then, the slabs enter a massive drying unit that removes any trace of water from the slab. The

unit places the slabs within an environment which is actually drier than the ambient air humidity, which allows for maximum efficiency in applying the resin.

From the drying unit, the slabs move to a machine that automatically reads the size of the slab and sprays the proper amount of resin. The spraying application takes place within a vacuum in the machine, which ensures that no air will enter the operation. After the resin is applied, it enters a second heating/drying unit, which speeds the reaction time of the resin with the stone.

Finally, the slabs move on to a PGM 2200 20-head slab polishing unit from Gaspari Menotti for processing from a 220-grit hone all the way to a final polish. Both units are equipped with diamond abrasive products from Tenax.

The factory can process a total of 2,500 square meters of slab material in two shifts (15 hours of work). A total of only three people, who monitor overall quality control, are required to oversee the operation. Operation intervention is even minimized at the polishing lines, because they are diamond technology and do not need to be replaced every few hours like conventional abrasives. According to Tenax, an abrasive head is replaced every one or two days.

Did you enjoy this article? Click here to subscribe to Stone World 

Recent Articles by Michael Reis

You must login or register in order to post a comment.

Multimedia

Videos

Image Galleries

Cevisama product gallery 2015

The 2015 edition of Cevisama was a showcase of the latest trends in tile design, including textured surfaces, colorful mosaics and worn concrete aesthetics

Stone World Magazine

Stone world 2015 may cover

2015 May

In this month's issue of Stone World Magazine, read about the MIA/Stone World Dallas Stone Summit, the Xiamen Stone Fair and the 2014 Pinnacle Award Winners

Table Of Contents Subscribe

Contemporary Stone & Tile Design Magazine

CSTD Spring 2015 cover

2015 Spring

In this issue of Contemporary Stone & Tile Design, we bring you our annual focus on Kitchen & Bath Design. From a beach-inspired bathroom design to a kitchen backsplash made of circular mosaic tile, the following are filled with illustrations of innovative and unique uses of stone and tile.

Table Of Contents Subscribe

STONE STANDARD

Are you aware of the new stone standard – ANSI/NSC 373 Sustainability Assessment for Natural Dimension Stone?
View Results Poll Archive

The Stone World Store

How_To_Polish_&_Restore_Mar.gif
How to Polish & Restore Marble Flooring

This video will show you step-by-step how to resurface and polish marble flooring from grinding and removing lippage and scratches to achieving a highly reflective polish.

More Products

Stone Industry Education

Stone Industry Education

From fabrication...to installation...to marketing and much more!  We provide natural stone professionals with stone knowledge and education they can count on, as well as great networking opportunities. Click here to go to Stone Industry Education.

STAY CONNECTED

facebook logo Twitter  YouTubeGoogle+

Stone Guide 2014

2014 Stone World Stone Guide

The directory for Stone, Equipment and Supplies - the single information resource readers turn to.