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design cutting moulds (by step)

first you have to document the type of presses that exist: mechanical, hydraulic and screw. look for machine manufacturers and see their catalogs. sees their tonnage and cadence as well as their tables. You will see that there are so many sizes and sizes. you will find that you need to know the presses that have the customer who orders you the mold. there is no genetic average size
 
Matricola_Gigi said:
Hello reborn, thank you for your part, that's what I want:)
I know what the difference between a slicer/punching mold and a thermoplastic. The second doubt I'll ever do.
starting from the assumption that this company only produces step-by-step molds, I want to learn this type.
therefore we start from the assumption of large series of pieces that must be produced.
I wanted to know about the presses: If the customer alone gives us the design of the piece and the thickness of the sheet, is there a "average press" for which to design the mold? Is that why press power design it as default? and then, what is the minimum space that has any press, where to rest in the mold?

Thanks again
Click to expand...
Hi gigi,
when a customer commissions you a project for a mold, the basic things to have to start planning are:
drawing 2d or 3d of the piece and material type, quantity of batches that want to realize, the press where the mold will be mounted (fundamental size, press force and minute strokes, run more light max and minimal)with this data you can start has reason on the project you will develop.
Hi.
 
Matricola_Gigi said:
Hello reborn, thank you for your part, that's what I want:)
I know what the difference between a slicer/punching mold and a thermoplastic. The second doubt I'll ever do.
starting from the assumption that this company only produces step-by-step molds, I want to learn this type.
therefore we start from the assumption of large series of pieces that must be produced.
I wanted to know about the presses: If the customer alone gives us the design of the piece and the thickness of the sheet, is there a "average press" for which to design the mold? Is that why press power design it as default? and then, what is the minimum space that has any press, where to rest in the mold?

Thanks again
Click to expand...
You make me wonder: If you haven't been given some data on the final customer's press park, will it be up to you to identify the most suitable press offered by the market, and buy it? If so, I'm afraid you won't get a spider out of the hole. at least in short time and in the preventive costs.
If your donor is testing you to figure out how much you're brought to the place, it must be a "big guy."
and just to remove a variable: cold molding, right?
 
gigi, give me a curiosity: are you a expert? An engineer? Are you at first or second experience?



in university they taught her these things and perished even though vaguely.



then as always every person specialized in what is best, in fact there are those who followed the motors and racing cars and the design of automobile components, who preferred to do the commercial technician because he has a nice talker even if unprepared, who went to warm the chair, who had the bang of blow to make the safety officer without understanding anything mechanical, who designs mechanical organs pushed and new size, machines of various nature and machines. who is most brought for one thing or another.



It gives me that you still have to find your way with the types of questions you ask. the advantage is that you ask and therefore you have the opportunity to improve and find your way. your employer may also slam into educating you if he wants to keep you....maybe there are some natural skills for teaching that is probably without it since he left you in canvases
 
Hello reborn, yes, cold molding.
No, I don't have to sell presses.
I didn't think it took all these varieties on the presses to design a mold... The fact is that on books and manuals, there's only the design of the mold designed, and not even the size of the press...
the drawings that I am studying, contrary to you all, tell me only how the mold works (punzoni that descend and draw, centritori that center the sheet during processing, premilamiera that pushes on the sheet, matrices, screws and thorns), but they say nothing about the presses to which they are housed.
I don't think a guy comes and gives me the shape measurements, and then I tell him he buys a press to produce these pieces... I think you're telling me to own a press of some power... I have to start this assumption here, but I'm pissed off. At least for now.
we say that precisely the hypotheses are dimensions, thickness and material of the shape and dimensions of the compartment and power of the press.
then, the press is scheduled to go down and climb a tot? The race, right?

Thanks again
 
the press is planned to climb and descend its race with a certain force.
if your boss is not a cellarer, it must have x force the perimeter accounts to be drawn and to be folded, sheet thickness, yielding load, calculation of punching forces and extractor, kinetic energy press, calculation efforts etc. etc. If you don't, you better go to a real professional.
 
There are books in the office talking about this data here, eh. The yield and the breaking load I suppose are the same?
 
You're supposed to be wrong. uts or rm breaking load is the traction test. the rs or rp0.2 yield load is the limit where the material begins to have plastic elastic deformations. the load of cutting or punching torture is about 4/5 of uts. I would say that you must before drawing molds and thinking about presses you have to do a basic course of construction science.
If you don't know the difference between these two things, you'll hardly make a mold right. If instead of pulling you have to pray or throw you have to use the green curves of the materials obtained from the engineering ones... and here it is complicated if you are not clear the base....
 
incorrect corrige: not green curves but true curves.

curves where there are deformation efforts are divided into real and engineering. Presses are used when you need to dimensional a cutting or deformation process, while the second ones for checking or measuring mechanical organs
 
So, in the hairstyle, the parameter of the sheet that interests is only rm? and this parameter depends on the thickness and material of the sheet, right?
 
depends on the alloy of the material, the treatment and varies depending on the thickness. Well rm is the one from which rt
 
I'm at the first experience, but I'm so excited to learn. at least the basic things of a cutting mold. The other guy in the office is busy designing to listen to me. .
 
Nice training that makes you... you have to study some nice manual. But you could follow the project that is developing your partner
 
No, what he's planning is bending and fun, a mess. to me he gave to study an easy design, only of hairstyle. that is why I understood the operation, and hand hand I am understanding (thank you) of size and loads of breakage.
In your opinion, if there are more silhouettes on the sheet than the other side, how much is the minimum distance between them?
 
at least twice the thickness, but also depends on the shapes, thickness, and material. p.e. if the edges approaching are 2 +/- parallel segments better to round excess, if they are curved, you could recover something.
but an anonymous pdf cannot post it, for my personal curiosity?
 
So the average is twice the thickness. You don't need to be curious, it's a simple silhouette:) you, of these molds, eat them at breakfast:)
 
Let's say that cautiously 2 times the thickness can always go well if you make hairstyle even if it varies depending on the material and thickness...tant is that you also get to 0.8 x thickness
 
Okay, got it. Trying to keep me up at least twice for safety. and can you tell me a formula for calculating the friction between punch and primer?
 

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