Low injection speed—if the injection rate is too slow, the material cools and solidifies before the mold is filled. Because thematerial fills the cavity in a tongue-on-tongue fashion, onelayer may begin to solidify before the next layer bonds to it.This results in a separation after demolding and manifestsitself as delamination. Injection speed is increased in 2% increments until delamination is eliminated. If flashing or burningoccurs, injection speed cannot be further increased, and otherdefect sources are investigated
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