The Shaw Process
Economical and accurate mouldings
Pump components, especially impeller and diffusers, were ideally suited to the process due to their dimensional accuracy, surface finish, reduced machining allowances and relatively inexpensive pattern equipment.
Because of the high cost of the block refractory moulds it was felt that a method to reduce this cost had to be found. The R & D department came up with a contoured hard back mould to which the Shaw facing could be applied – called Ecoshaw.
This contoured mould did reduce the mould cost and, in addition, improved the casting quality and metallurgical structure which allowed changes of section to be achieved without a complicated runner system. A further plus was that the raw materials were environmentally friendly hence the name Ecoshaw.
Automotive
General Engineering
Manufacturing
Oil and Gas
Power Generation
Production
Pumps
Special Projects
Automotive
General Engineering
Manufacturing
Oil and Gas
Power Generation
Production
Pumps
Special Projects
Advantages of Shaw Process castings
Dimensional Accuracy
Castings accurate to ISO 8062 Grade CT4-6 tolerance specification
Short Run Production
Because the Shaw Process uses an oversize pattern, the preliminary set-up costs are lower than for other precision casting processes, thus making it ideal for relatively short runs.
Larger Run Production
Inexpensive replication of original pattern equipment can be carried out to increase production efficiency and outputs of larger volumes.
Reduced Machining Allowances
Because of their dimensional accuracy, Shaw Process castings can offer savings in machining costs due to reduced machining allowances. Typically machining allowances are limited to 3mm maximum. In some cases dimensions can be used ‘As cast’ and in others only grinding allowances are left on the casting.
Surface Detail and finish
Because the Shaw Process mould is applied to the pattern as a slurry, it is able to flow into extremely fine detail. When the mould forms it is sufficiently strong to retain the detail which is reproduced on the casting The surface finish achieved on cast surfaces is N8 to N9.
Complexity
The use of high quality Shaw Process precision castings can often enable designs for complex components to be realised which may be impracticable by other means.
Starting with a Concept?
Providing solutions to meet our customer requirements
Bonds Precision Castings can liaise with clients on casting design and development by electronic interaction, significantly speeding up casting design at the concept stage.
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