How much pressure can you expect from a pneumatic press?
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How much pressure can you expect from a pneumatic press?
I know I'm being ignorant, but I cant find the numbers on how much pressure a pneumatic press can put out. Im looking for a figure in lbs. My mold is made for a single hose, 9" wide by 78" long. Im hoping to get 45 psi. I dont know if this number is right, but I'm getting 63,180 lbs of pressure over the entire press. This number cant be right.
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- MontuckyMadman
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contact patch is what you need to measure. Fully inflated your hose may not be in contact for the whole nine inch width. (This is why we use cat tracks). In essence though your calcs are seemingly correct. psi times actual contact area. At 70 PSI my press is taking about 120,000lbs of pressure.
In other words your press needs to be insanely strong to press at a high psi.
In other words your press needs to be insanely strong to press at a high psi.
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63, 180 is wrong
9" wide flat, we could approximate 7" contacting the mold when inflated (to be safe, I think it will be less). Assuming every inch of the 78" contacts the mold you'll have
78in x 7in x 45lbs/in^2 = 24,570
Long story short, if you didn't engineer your press to handle that load take out a life insurance policy ASAP.
9" wide flat, we could approximate 7" contacting the mold when inflated (to be safe, I think it will be less). Assuming every inch of the 78" contacts the mold you'll have
78in x 7in x 45lbs/in^2 = 24,570
Long story short, if you didn't engineer your press to handle that load take out a life insurance policy ASAP.
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Actually, you are wrong.tantrum wrote:63, 180 is wrong
9" wide flat, we could approximate 7" contacting the mold when inflated (to be safe, I think it will be less). Assuming every inch of the 78" contacts the mold you'll have
78in x 7in x 45lbs/in^2 = 24,570
Long story short, if you didn't engineer your press to handle that load take out a life insurance policy ASAP.
The air bladder is making contact on the top and the bottom. The calculation should be 78 x 14 (7 on top 7 on bottom). You have 1092 square inches of contact. Multiply that times your intended pressure of 45lbs per square inch and you see that you need to make sure that your press can withstand about 50,000 lbs of pressure not including your safety factor.
Determining actual force at the laminate is a differet topic.