一些类型的口模积料会很快氧化并变成棕色或者黑色。

Some types of die buildup oxidize quickly and turn brown or black.

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对着口模出口进行空气吹扫能帮助减少和控制积料。

Air sweeps pointed at the die exit can help reduce and control buildup.

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有时，较低的口模温度会在口模内表面上生成一个冷却的树脂层，这个树脂层慢慢地移出到口模出口，然后与本体料流分离，从而引起积料。

Sometimes lower die temperatures can create a cool layer of resin on the inner surface of the die that creeps slowly to the die exit and then separates from the bulk flow, causing buildup.

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