Reply by Nicholas Hall

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Posted on Are Most Benchtops Woefully Underclamped during Glueup? (probably not)

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Nicholas Hall

352 posts in 2135 days

#1 posted 12-06-2012 06:52 PM

@crank: In my family business PRC Industrial Supply in Porland ME, we used airbags to generate pressure for the vulcanization of conveyor belts. The system used four 10”x6” H beams and an airbag. We would charge the bag to 100psi and it would exert 151,200 pounds of force on the splicing area heated to 300 degrees. That’s how you splice 6 foot wide industrial conveyor belts in paper mills. It works like a champ, but the splicing press is wee bit costly as you suggested!

@David Craig: It’s possible that I read the article wrong but I don’t think so. What he does say specifically in the article is that it is very nearly impossible to “starve a glue joint” with too much pressure, because most people have never seen enough clamps to accomplish this feat, let alone own enough clamps to do it themselves.

Pounds per square inch seems fairly unambiguous. If you have 384 square inches, and you need to generate 900 psi for a glue joint, you need to generate 345,000 pounds of force to accomplish this. At least that’s how I interpret it.

Are there any engineers out there with access to Fine who can take a look? I’m really curious at this point.

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