How Long To Cure
Hi Zeal,
This type of question is better answered by the Vendor supplying the rubber. Talk to the Technical Representative by telephone.
If you want a more general answer, and are prepared to wait for someone on the Internet to take some interest in helping you,I would recommend www.eng-tips.com
Regards - Sgt John.Rz
www.latviantourists.com.au ■
Rubber Curing
Industries processing large quanty of rubber such as tire companies usually check and standerdise cure time and other cure characteristics batch to batch using a Scorch Tester in the Mill Lab. Small industries normally do not have this tester. Therefore the best way is to test mould specimens of the same thickness as lining in a lab hydraulic press and check if max T.S is obtained. You may probably be doing lining with NR. The cure time for test specimens in a mould cure may not exceed 5 min. But steam cure - open or under tarpauline -will need much more time and an app. estimate of time is to multiply the specimen cure time by the area of lining divided by the specimen area. ■
Lack Of Curing
Thanks for the comment,
We ordered some pipe to be polyurethane lined. After a few weeks of service the material de-bonded. Inadequate curing was the cause. The Vendor used a simple steam curing adaption at the side of his workshop.
We had to strip all the PU and reinstall the main pipe to a slimes dam. Cost heaps to fix.
Regards - Sgt John.Rz
www.latviantouristsociety.com.au ■
Steam Curing
Sorry this is not part of the discussion forum, but could anyone please assist.
We've just finished rubber lining a tank (4m diameter X 3.5m high) with 60 shore 6mm steam cure rubber and is ready to start the curing process. To cure we'll cover the tank with a tarp and apply steam.
Is there any formula to work out the time it will take to cure the rubber? ■