MAKING A MOLD
Fiberglass-reinforced polyester molds can be used for different / various manufacturing processes. The most widely used application is manufacturing pieces manually or with combined machines of chopping and applying fiber (polispray). In building a mould is important the experience of the one who works and it is recommended to choose the materials carefully which ensures the long-term quality of the mould.
Whatever of the application, the mould composed of two independent layers: surface layer, structure or strength layer.
Surface layer gives the shape and the quality of the piece and, therefore, has a special importance/ significance.
The structure layer confers resistance and mechanical stability and varies according to the way the mould will be used
berglass-reinforced polyester moulds can be used for different / various manufacturing processes. The most widely used application is manufacturing pieces manually or with combined mach.
1. Construction model (Masters)
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Using gelcoat matrix is required to obtain a faultless surface, glossy and durable.The operator must strictly monitor and control the application procedures. A large number of mistakes do not occur until after mold release and are caused by non-compliance of use,
4. Laminate surface
The first layer is reinforced veil In an area, plus a layer of chopped fiber (stratimat) 300 gsm, powder. Be applied immediately after the gelcoat has hardened layer well (from at least 3 hours and up to a maximum of 6 hours).
Manually produced molds must be reinforced by additional rolling resistance layer and adding inserts. Alternatively, the matrix can be strengthened by making a rolling resistance layer sandwich,
Inserts and support can not be applied until the surface layer did not dry for at least two weeks.
To reduce the risk of internal stress and dimensional change of the laminate, teaching or reinforcing elements of steel angles or similar sections must be assembled on the mold after having been preassembled,
To reduce the risk of internal stress and dimensional change of the laminate, teaching or reinforcing elements of steel angles or similar sections must be assembled on the mold after having been preassembled,
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If the model surface is resistant to styrene monomer and if wax was carefully should not experience problems in removing the mold from the model.
Connecting the compressed air ejector, mold can be removed from the model,
8. Materials needed
Gelcoat for molds, resin molds, general purpose resin, gelcoat for molds, peroxide M.E.C. (hardener)
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