Description:The depressed deformation on the surface,ribs,raised part and/or the back side(shiny or dark).
Condition:uneven shrinkage during molding.Solution:
1).use low or no shrinkage resin in formulation for sheet molding compound(SMC).2).Increase the temperature of Cavity or Core and to bring the temperature difference between Cavity and Core to 5--6℃.
3).increase the pressure and shorten the length of glass fiber.4).improve the mold design,change the feed position.
5).narrow the gap between core and cavity of fiberglass mold.
Condition:uneven shrinkage during molding.Solution:
1).use low or no shrinkage resin in formulation for sheet molding compound(SMC).2).Increase the temperature of Cavity or Core and to bring the temperature difference between Cavity and Core to 5--6℃.
3).increase the pressure and shorten the length of glass fiber.4).improve the mold design,change the feed position.
5).narrow the gap between core and cavity of fiberglass mold.
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