With its emphasis on service and flexibility Vanguard Foundry Ltd offers two
distinctly different moulding systems to its customers, a high pressure green
sand moulding line and a chemically bonded boxless moulding system. The green
sand system, based on the Heinrich Wagner Sinto (HWS) moulding machine, is
ideally suited to the smaller product with repeating or high volume demand.
The chemically bonded system with its variable mould size can cater for much
larger castings and also suits the low volume items which repeat rarely if
ever. Both systems give good dimensional stability and repeatability.
The HWS HSP-2D moulding machine was chosen after careful consideration because
it most closely matched the companies' needs. In tests it had proved to provide
the quality of casting finish and dimensional accuracy demanded by our customers.
The air-flow, hydraulic squeeze system this machine employs ensures good repeatability
and enables Vanguard Foundry to easily transfer to high volume foundries, for
long series production, the prototype product it develops with its customers.
Conversely Vanguard Foundry is ideally placed to receive back the business
when the product has reached maturity and demand is reduced to after market
volumes.
The flask size is 800mm x 650mm x 250mm/250mm. Castings up to 40kg can be accommodated
on this moulding line.
Originally the airset moulding system at Vanguard was created to provide a
developement facility for our customers to minimize initial investments but
the system has been expanded and developed and is now a production unit in
its own right. Patterns wich may be wood, resin or metal are mounted in compact
frames and supplied to the mixer head from a carousel transfer unit. The carousel
then moves the pattern and sand around to the stripping station during which
time the chemical reaction occurs giving a rigid mould without the need for
external support. The mould is given a coating to prevent sand burn onto the
finished casting before being closed and transferred to the casting line for
pouring.
The maximum mould size on this section is 1200mm x 1000mm x 500mm/500mm and
a maximum casting weight of 200kg.
