The Alston plant, which has been running for 65 years, is distinguished for its part in inventing a Shaw Process
, a specialist ceramic technique.
In case of larger parts, having complex shape and good accuracy requirements the Shaw process is used.
Nevertheless, the Shaw process is still well protected by patents and licenses and many researches are cared on to improve it (Cernat & Simionescu, 2009).
Ceramic molding may be accomplished through three techniques: "true" ceramic molding, ethyl silicate slurry molding and the Shaw process, a variation of the ethyl silicate process.
In the Shaw process, split molds are made by pouring a refractory slurry over a prepared pattern.
Precision Products, which has been based in Alston for 60 years, produces high-specification, small steel castings by the Shaw Process
, a specialist ceramic method that it was instrumental in inventing.
The application of Shaw process makes it possible to produce castings from all known foundry alloys with no presently known size restriction that can be the main advantage of this technology.
In the Shaw process, after setting and stripping the pattern, the mould is immediately subjected to a rapid, uniform and intense flame firing with the aim to remove the alcohol generated during hydrolysis.
2b shows the die insert cast in the composite ceramic mould produced in accordance with Shaw process.