d3b8e 01 diffusion vaccum bonding hot pressure welding Diffusion Welding Manufacturing Engineering Diffusion Bonding

Diffusion bonding or welding is a solid state joining process wherein coalescence of the faying surfaces is produced by the application of pressure and elevated temperature to carefully cleaned and mated metal surfaces so that they actually grow together by atomic diffusion. Diffusion welding takes longer welding time.

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2c913 01 hobby aluminum casting co2 sand casting process Aluminum casting process Manufacturing Engineering Hobby Aluminum Casting

CO2 sand casting or Hobby Aluminum casting is suitable for urgent and heavy orders with high accuracy and good surface finish on castings required. Hobby mould casters used this method because in this method elimination of core drying machine, but it is not an economical process. The only expense hobby mould caster encounters are the cost of the CO2 cylinder, regulator, and hoses and hand held applicator gun or nozzle. The operation is fast and the possibility of rejections is less. CO2 is a sand molding technique and it uses grain sand which is mixed with a solution of sodium silicate that acts as binding agent. CO2 gas is used to harden the mass of sand after the mould has been made.

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