Analysis: The good plastic parts quality is depended on an good mold and an proper Press with proper molding factors, the mold which can run good production in China mean the mold have no problem, So it must be the problem of Press.
Conclusion: Usually, The Press in China which running the mold is bigger than the required Press by the customer, its molding condition can't fit the customer's Press, it need to reset up the molding condition of customer's Press.