Blog Euskatfund

Published on 08/05/2014 by Euskatfund

FOUNDRYCOTE XR-14 -Refractory ceramic primer

Foundyrcote XR-14 has been developed in collaboration with some foundries customers to optimize the molding system, avoiding some defects in parts, as calcinations, burn-in, veining and other defects.
It is used in cast iron, steel and nonferrous metals, such as priming agent, to consolidate the surface of moulds and cores, giving them greater mechanical strength, thermal and abrasion.
The main feature of this coating is the penetrating ability, obtained with special additives and refractory charges with a very fine grain size, allowing filling the pores in the mould surface, which can cause irregularities and defects.
The product can be applied over the entire surface of the mould when large thickness or to solve particular problems, or only in the most critical and stressed during melting by heat (corners, cavities ...) points. Forms a refractory ceramic shell very resistant to temperature and metal penetration.
It is necessary that the product does not believe thickness on the mould, it is fully absorbed and well dried before applying usual refractory coating or melt.
Air is allowed to evaporate (at 20 ° C in dry approximately 90 minutes) or in an oven at 60-80 °C for 15 to 20 minutes ..
If production times are too fast, it can flaming after application, obtaining in each case very good results.
Foundyrcote XR-14 gives good results in most moulding systems; Our experience is established particularly in the following applications:
  1. manual or automatic moulding, in moulds furanic or alkaline phenolic resin. It is applied by brush or spray the first layer to avoid calcination and increase the thermal resistance of the mould/core.
  2. cores (cold-box and hot-box)
Is used by spraying or immersion before or instead of applying the traditional coating.
There is a concentrated type that can be used as is or diluted to 100 + 15% and a o another that comes already diluted.
Several customers using Foundrycote XR-14, have managed to eliminate the defects in parts, which are usually difficult to resolve. It has sometimes been replaced chromite sand, using traditional new silica sand or reclaimed with Foundyrcote XR-14.
The most interesting results were obtained in steel or nodular foundries producing casting for the eolico or nuclear sector, with thicknesses up to 800 mm, where high quality superificie and total absence of defects is required.

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