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 pray-up
molding is derived from hand lay-up molding and is particularly suited
to parts of medium to large dimensions and simple shapes.
Parts produced by spray-up include pleasure boats, swimming pools,
covers, end caps of large diameter tanks, reinforced acrylic and gel
coated bathtubs.
Productivity improvement compared with hand lay-up molding. |
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The process consists of simultaneously spraying
onto the mold chopped glass strands, normally of 30 mm length, and
the resin necessary for their impregnation. After spraying onto the
mold, rolling by hand is necessary to flatten or compact the glass-resin
mixture well onto the mold and, as far as possible, eliminate air
bubbles generated by the spraying system.
The spray machine generally consists of:
a glass chopper driven by compressed air
a pneumatic pump for feeding resin to the spray gun
a solvent delivery system for cleaning
the gun.
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Click on picture to enlarge. |
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Asia
Pacific
