la bala Posted March 4, 2016 Author Report Share Posted March 4, 2016 They were mainly used for making "Packer" seals, Safety shut offs for oil rigs, Once made it was split into 2 halves and placed around something or other on the drilling deck, If they had a serious blow back then it was compressed, sealing off anything escaping, Reason so much pressure was needed was because it was uncured rubber with a thick steel disc on either end, as the rubber heated up it would be compressed by the press, (inside a die) The excess rubber extruded out as it was compressed to the right height and cured over time required, Surprised I remember all that, Steve42 off here used to make the dies and the steel rings. Interesting read Quote Link to comment Share on other sites More sharing options...
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