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What is the reason for the tearing of the fluorine rubber gasket?

Update:30-07-2020
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What is the reason for the tearing of the fluorine rubb […]

What is the reason for the tearing of the fluorine rubber gasket?

The tearing of fluororubber gaskets is generally caused by two processing processes: tearing during trimming and tearing during mold removal.

The former is mainly caused by too thick scrap edges; the latter has many reasons, including the following aspects: the mold fit is too tight, the scrap edges are jammed by the mold when the mold is drawn, and it is easy to tear from the product and the scrap edges. Opening; Uneven force when starting the mold, easy to cause stress concentration and damage to the product; rough surface of the cavity or easy sticking of the rubber material, making it difficult to demold, and easy to tear the product; the vulcanization temperature is too high, and the fluorine rubber under high temperature The tearing performance is poor; the crosslinking density is high, which leads to the decrease of elongation, and the vulcanizate is also easy to become brittle and easy to tear; the scrap edge is too thick and the product is easy to tear when the mold is removed.

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