When local curing occurs in the mixing process of two-component rubber, crust or vulcanization will occur in the rubber produced by rubber gun. There are three main reasons for this phenomenon:
(1) When the colloid is black and solidified quickly, it may be due to the high proportion of B component, and the excessive catalyst promotes the speed of solidification. At this time, it is necessary to reduce the proportion of B component appropriately and rinse the crust or vulcanizate before construction.
(2) If the gelling process is accompanied by slow gelling, it may be that the mixed core has not been cleaned for a long time or is not thoroughly cleaned, and the gel crust blockages the pipeline. Therefore, it is necessary to clean the static mixer regularly.
(3) When there is no abnormal curing and tapping speed, and there is still crust or vulcanization in the tapped rubber, it may be that the equipment has been shut down for a long time, the rubber gun has not been cleaned or the gun has not been cleaned thoroughly enough, so it is necessary to rinse the crust or vulcanizate before construction.
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