2 Editoriale - Criteri nella scelta di un impianto di resinatura

Editorial – Choice criteria in the selection of resin plants

Today, there are so many resin plants for slabs on the market that stone processors may find it hard to choose the ideal one. Indeed, with such a vast array of models and brands now available it is easy to get confused and make wrong decisions.

Slab producers should be aware that the use of inappropriate plants for the restoration of faulty stone may blunt their competitive edge. Indeed, companies who choose resin plants which are not suitable for their production requirements will never be able to meet the quality standards demanded by developed countries, and accordingly they will lose significant market share to their main competitors.

For example, companies dealing in onyx who pick plants equipped with curing ovens which are small if compared to the work rate will soon regret their investment, because they will be forever counting the damage done by the high temperatures set by their ovens’ manufacturer to speed up the cure greatly.

Here are a few handy tips from us to ensure you choose the right make and model to suit your individual needs.

First of all, you should have clear ideas of what the most frequently treated materials will be. In fact, the type of loader (manual, semiautomatic or automatic) and the extent and equipment of the “mesh attachment and resin application station” (number of worktables, possible inclusion of vacuum chambers, stackers, mesh dispensers and resin applicators) have to be decided according to the conditions of the slabs, that is to say likely quantity and nature of cracks.

The right type and capacity of the drying and curing ovens depend on the chemical composition of the stone, and exactly on its water absorption rate and thermal resistance.

The resin properties must be in line with the colour of the material. For example, white marble slabs must be coated with non-yellowing slow-setting resins. Therefore, the size and heating system of the curing oven have to be compatible with the resin used extensively by the factory’s workers.

You should carefully calculate how many slabs you expect to process in a day, and make sure that the mechanical speed of your plant (which results from its layout configuration and level of automation) will be high enough to allow you achieving your production target on a continuous basis.

At that point, you should decide where to position the plant in your factory. If two or more areas are available, then you should choose the one which is ideal to speed and streamline the slab production process, and so it is essential to plan the interaction with existing or planned pieces of processing equipment, such as gang saws, honing and polishing lines. In the case of constraints due to the shortage of space, the machinery designers will have to prove their creative skills and tailor design a plant that fits in the site and boasts all the necessary features.