When the two-component rubber is partially cured in the mixing process, the rubber produced by the beater will appear skinning or vulcanization. There are three main reasons for this phenomenon:

⑴胶体颜色较黑，固化快时，可能是由于B组分比例过高，过多的催化剂促使固化速度快。此时，需要适当降低B组分的比例，将结皮或硫化胶冲洗干净后施工；

⑴ when the colloid color is black and the curing speed is fast, it may be due to the high proportion of component B and too much catalyst. At this time, it is necessary to properly reduce the proportion of component B and wash the crust or vulcanizate before construction;

⑵打胶机若打胶过程中伴有出胶慢的现象时，可能是混合芯长时间未清洗或清洗不干净，胶体结皮堵塞管道。因此，定期清洗静态混合器是很有必要的。

(2) if the gluing machine is accompanied by slow glue output in the gluing process, it may be that the mixing core has not been cleaned or cleaned for a long time, and the colloid crust blocks the pipeline. Therefore, it is necessary to clean the static mixer regularly.

⑶当固化和出胶速度均无异常，而打出的胶仍有结皮或硫化现象时，则可能是设备停机时间较长，胶枪未清洗或洗枪不够干净，需要将结皮或硫化胶冲洗干净后后施工。

(3) when there is no abnormality in the curing and glue outlet speed, but there is still peeling or vulcanization of the punched glue, it may be that the equipment has been shut down for a long time, the glue gun is not cleaned or the cleaning gun is not clean enough. It is necessary to wash the peeling or vulcanization before construction.

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