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coldpress

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=85202
Printed Date: 26 Sep 2024 at 1:18pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: coldpress

Posted By: fareez
Subject: coldpress
Date Posted: 21 Feb 2014 at 10:45am

Dear all,

I am developing an old hydraulic cold press machine ( which has a directional valve for pressing and a remote valve ) and I need to inverse the pressing method by inserting the mold above ( over ) the piston instead of under it , so the piston will press the mold while going up instead of pressing it while going down. Is there any problem/ damage that may happen to the piston ?

Thanks a lot

Fareez

Replies:

Posted By: steve(ill)
Date Posted: 21 Feb 2014 at 12:28pm

Not sure of your exact press, but small units were pressure down, then spring to lift it back up. If you have two way hydraulics, then you should be o.k. Just realize that a 50 ton press might only have a few tons to lift the ram back up. As long as this is a small load you should be o.k., but your wont get any where near the lift load that you have on the press load. Why does it have to be on lift, why not modify the procedure so you can press down ?

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Like them all, but love the "B"s.

Posted By: Coke-in-MN
Date Posted: 21 Feb 2014 at 12:34pm

So your saying the mold has to be on top of the piston ?

Pressing down - the ram takes the force onto mold - but back of piston is still anchored to top of press so all force is exerted there also.

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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."