Hello,
I am building a juice press (apple) with hydraulic pressure (jack cam 15 T).
the tank is 60cm high by 43cm in diameter, it rests on a 60 / 57cm thick oak "floor" 35mm thick.
I would then like to make an iron frame capable of withstanding the pressure of the jack.
and there knowledge in tensile strength (vertical part of the frame), and in bending (horizontal part) of the iron is necessary for me to evaluate the minimum dimensions to be taken for the realization of a solid frame.
would it be better IPN, or iron in H ??
Thank you for your help.
Manufacturing press juice
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- Econologue expert
- posts: 4075
- Registration: 12/01/07, 08:18
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The pressure on this tank with 15 tonnes is around 10 Bars and does the tank withstand 10 bars (Much more than 30 tonnes on its conference (if piston sealed) and therefore the tank risks cracking at the periphery ??? ?
In my opinion, you do not need 15 tonnes by being a little patient that the apples crush with a few pounds per apple !!!
Sinon
properties of steels:
http://fr.wikipedia.org/wiki/Acier
mechanics of basic beams for calculation:
http://fr.wikipedia.org/wiki/R%C3%A9sis ... C3%A9riaux
http://fr.wikipedia.org/wiki/Th%C3%A9orie_des_poutres
For 15 tonnes you need a lot of steel and you can test on a bar that deforms and deduce its necessary size.
The small diameter allows to use not too big.
But my snitch tells me that you don't need 15 tonnes !!
Unless you want to squeeze a whole tank every minute !!!
Or extra green apples ???
In my opinion, you do not need 15 tonnes by being a little patient that the apples crush with a few pounds per apple !!!
Sinon
properties of steels:
http://fr.wikipedia.org/wiki/Acier
mechanics of basic beams for calculation:
http://fr.wikipedia.org/wiki/R%C3%A9sis ... C3%A9riaux
http://fr.wikipedia.org/wiki/Th%C3%A9orie_des_poutres
For 15 tonnes you need a lot of steel and you can test on a bar that deforms and deduce its necessary size.
The small diameter allows to use not too big.
But my snitch tells me that you don't need 15 tonnes !!
Unless you want to squeeze a whole tank every minute !!!
Or extra green apples ???
0 x
- Paul
- I understand econologic
- posts: 72
- Registration: 29/06/11, 09:49
- Location: France southwestern Ariege
- x 1
and no, in ariege there is not, apart from Rénova, an association, but which has prices a little high for me.
It is true that 15 T is a lot, according to you would be enough? 8?
what is the pressure exerted by the screw of a press of the same dimension?
A yes while I'm at it, does anyone know the size of the mesh of the bag used? that of the Belgian craftsman for example.
Thank you so much
Paul
It is true that 15 T is a lot, according to you would be enough? 8?
what is the pressure exerted by the screw of a press of the same dimension?
A yes while I'm at it, does anyone know the size of the mesh of the bag used? that of the Belgian craftsman for example.
Thank you so much
Paul
0 x
With patience, the orchard becomes jam.
- Paul
- I understand econologic
- posts: 72
- Registration: 29/06/11, 09:49
- Location: France southwestern Ariege
- x 1
gallery
and hop some photos
everything is in oak, except the strapping of course, and the drain pipe (': mrgreen:')
I also read on a forum, that it was not necessary (for a pasteurizer) to use copper pipe? (it tastes) what do you think?
Stainless steel is expensive, how did they do it before?
aren't the stills made of copper? Yet it doesn't taste like copper, does it ??
everything is in oak, except the strapping of course, and the drain pipe (': mrgreen:')
I also read on a forum, that it was not necessary (for a pasteurizer) to use copper pipe? (it tastes) what do you think?
Stainless steel is expensive, how did they do it before?
aren't the stills made of copper? Yet it doesn't taste like copper, does it ??
0 x
With patience, the orchard becomes jam.
For the tensile strength the profile chosen does not matter: only the section and the quality of the steel counts; two rounds of 20mm semi-hard drawn should do the trick.
For the upper part which takes a force perpendicular to the profile it is another problem. The skill seems to me to seriously triangulate the chosen profile rather than oversizing said profile (note that this is a way of transferring the tensile forces, so in a very favorable configuration).
I detail a little more to be sure of being understood:
On the center of the horizontal profile is welded a vertical profiled pillar (because it supports compressive forces); then, a tie rod welded to one end of the base profile is welded to the top of the pillar, folded * at this point to join the other end, as at the beginning.
It works like on bridges ...
Last point: the IPN profile resists this type of effort better than that in H.
* If you do not have the possibility of folding, it is equivalent to using two steel rods instead of one.
For the upper part which takes a force perpendicular to the profile it is another problem. The skill seems to me to seriously triangulate the chosen profile rather than oversizing said profile (note that this is a way of transferring the tensile forces, so in a very favorable configuration).
I detail a little more to be sure of being understood:
On the center of the horizontal profile is welded a vertical profiled pillar (because it supports compressive forces); then, a tie rod welded to one end of the base profile is welded to the top of the pillar, folded * at this point to join the other end, as at the beginning.
It works like on bridges ...
Last point: the IPN profile resists this type of effort better than that in H.
* If you do not have the possibility of folding, it is equivalent to using two steel rods instead of one.
0 x
"Please don't believe what I'm telling you."
tips:
http://pressoir-d-antan-metier-d-autref ... -blog.com/
http://www.bidouilleurs.net/spip.php?rubrique9
http://www.bidouilleurs.net/spip.php?article21
http://www.bidouilleurs.net/spip.php?article20
http://www.forumfr.com/sujet385828-jus- ... ssoir.html
Example of a commercial press:
http://www.tompress.com/A-1073-pressoir ... itres.aspx
To see the structure, the force reaches a few tonnes.
Otherwise, the ratio of displacement of the end of the lever to displacement of the piston multiplied by the force exerted manually (a few tens of kilos) gives this force.
Example 1cm per turn and lever of 50 cm which runs 2x3,1416x50 = 314 times the force exerted on the lever is for 10 kilos 3,14tonnes.
It all depends on the resistance of the fruit; but they advise to:
Then the necessary force is reduced, and remains reasonable.
http://www.meilleurduchef.com/cgi/mdc/f ... 579-1278-2
how to make good cider
http://www.saosnois.com/faire_du_bon_cidre.htm
http://cyberechos.creteil.iufm.fr/cyber ... 8cidre.htm
also pasteurize:
http://www.eco-bio.info/forum/upload/to ... ommes-bio/
http://www.tompress.com/CT-2457-faire-d ... cidre.aspx
http://www.arpentnourricier.org/conserv ... urisation/
http://pressoir-d-antan-metier-d-autref ... -blog.com/
http://www.bidouilleurs.net/spip.php?rubrique9
http://www.bidouilleurs.net/spip.php?article21
http://www.bidouilleurs.net/spip.php?article20
http://www.forumfr.com/sujet385828-jus- ... ssoir.html
Example of a commercial press:
http://www.tompress.com/A-1073-pressoir ... itres.aspx
To see the structure, the force reaches a few tonnes.
Otherwise, the ratio of displacement of the end of the lever to displacement of the piston multiplied by the force exerted manually (a few tens of kilos) gives this force.
Example 1cm per turn and lever of 50 cm which runs 2x3,1416x50 = 314 times the force exerted on the lever is for 10 kilos 3,14tonnes.
It is true that 15 T is a lot, according to you would be enough? 8?
It all depends on the resistance of the fruit; but they advise to:
To squeeze apples and other fruits with firm flesh, they will need to be crushed so that the juice can be expressed using a manual or electric apple grinder.
Then the necessary force is reduced, and remains reasonable.
http://www.meilleurduchef.com/cgi/mdc/f ... 579-1278-2
how to make good cider
http://www.saosnois.com/faire_du_bon_cidre.htm
http://cyberechos.creteil.iufm.fr/cyber ... 8cidre.htm
also pasteurize:
http://www.eco-bio.info/forum/upload/to ... ommes-bio/
http://www.tompress.com/CT-2457-faire-d ... cidre.aspx
http://www.arpentnourricier.org/conserv ... urisation/
0 x
- chatelot16
- Econologue expert
- posts: 6960
- Registration: 11/11/07, 17:33
- Location: Angouleme
- x 264
I discover this subject too late ... you found the right method of calculating resistance: make the point and strengthen if it bends
this method is best as long as there is nothing dangerous
note on hydraulic presses, to avoid the risk of dropping oil leaks in the juice: put the jack under the tray under the tank to be squeezed: the jack raises the entire tank: the frame around keeps the upper plate fixed
it is the classic solution of the old hydraulic press for walnut oil
Another advantage when the pressure of the jack is released, the weight of the tank makes it rise easily, and opens the press effortlessly
it is the classic solution also for wood gluing press
this method is best as long as there is nothing dangerous
note on hydraulic presses, to avoid the risk of dropping oil leaks in the juice: put the jack under the tray under the tank to be squeezed: the jack raises the entire tank: the frame around keeps the upper plate fixed
it is the classic solution of the old hydraulic press for walnut oil
Another advantage when the pressure of the jack is released, the weight of the tank makes it rise easily, and opens the press effortlessly
it is the classic solution also for wood gluing press
0 x
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