| Ferrous - Coatings |
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In case of centrifugal casting process, permanent metallic moulds are moving at very high speed. Refracote-300S coating is a thick coating to be diluted with water to the required baume of 1.25 or higher as per the requirement. Coating is kept in suspended form during operation by using stirrers. Coating is sprayed by spray systems on pre-heated metallic moulds, normally at 200 – 300 deg.cent. These mould are water cooled to maintain the temperature during the coating process. During the coating process the refractory coating thickness is maintained by number of sprays. The super-heated liquid metal is poured in the mould. Due to the centrifugal force, the liquid metal is moves to the periphery of the mould and solidifies during the process. In case of manufacture of cast iron pipes the pipes are removed with the help of extracting arm mechanism. The coating acts as a insulating material between casting and the mould and there is no difficulty faced during extraction process. The coating material comes out along with the casting, leaving clean mould surface inside. Color changing coatings options available as Refracote-300CC [A] & Refracote-300CC [B]
Refracote-200 S [A] & [B] is a two part water based ready for use coating for centrifugally casted cast iron castings. Two parts are mixed in the desired ratio and sprayed on the hot moulds maintained at around 180-200 deg. cent. The dsired coating thickness is maintained with the help of no. of passes of lancers.
RC-99 is powder based coating to be mixed with water and sprayed on hot mould maintained at a temp. of 180-200 deg.cent. Different grades are available for Alloy steel and cast iron based castings.
Refracote-400IP [Zircon Coating Alcohol Based]
Refracote-500 is a black coloured coating with a typical Odour. It is suitable for Launder / Runner coating in manufacture of pipes by centrifugal casting process.
Refrachill-50 is a ready for use coating for metallic chills. It has to be applied by brush and allowed to dry before final pouring.
Refracote-140 is a general purpose alumino-silicate based coating suitable for automobile castings. It is reddish brown in color and should be diluted with water to a viscosity of 14-15 sec by Ford B4 cup.
Salient features of the Coating are : –
Refracote-5 is a light blue coloured paste . It’s density is approximately -2.00 – 2.10 gms /cc. It is a dispersion of Zircon refractory in a blend of organic solvent, whose flash point has been adjusted to achieve best burning properties. The blend is highly volatile and inflammable. The unique property of Refracote-5 paste is that it can be diluted with either Isopropyl alcohol or Water depending on your coating needs. This coating provides a dense, strong deposit that resists penetration and erosion. |
Refracote-300S is a two part highly refractory based coating, with water as carrier liquid, suitable for centrifugal mould castings. It is in paste form and needs dilution in a fixed ratio depending upon the other parameters of the spray unit.
Refracote-400IP is a white coloured coating with a typical alcoholic odour. It's density is approximately 2-2.1 gms /cc. It is a dispersion of Zircon refractory in a blend of organic solvent, whose flash point has been adjusted to achieve best burning properties. The blend is highly volatile and inflammable. The coating is highly thixotropic in nature and needs dilution in few cases. 
Refracote-500F is a light red coloured coating specially designed for the socket-hub end-cores for manufacture of pipes by centrifugal casting process. . It’s density is approximately -1.40 – 1.45 gms /cc. It is a dispersion of Mixed Proprietary refractory in water as solvent. It’s viscosity is adjusted for 18 sec. for Ford B4 Cup
Refracote-402, water based coatings are designed specially for the Modern Foundry producing Grey & Ductile Iron castings to the highest specifications.