design cutting moulds (by step)

[Matricola_Gigi]

Good morning to all,
I'm just trying to learn how to design sheet cutting molds (by step).
in the office (I've been testing for a few weeks) they left me only with manuals and various notes, and I have questions to ask.
As long as I understand how these types of mold work, someone of good will, can you explain to me if the primer must be a block that must be between the top and bottom of the mold?
then, the size of the mold, how should it be calculated? I mean, the width of the sheet, who decides? ?

Thank you in advance and I ask you to help me please

Thank you.

he's doing it.

 

[marcof]

Good morning to all,
I'm just trying to learn how to design sheet cutting molds (by step)
(cut)
As long as I understand how these types of mold work, someone of good will, can you explain to me if the primer must be a block that must be between the top and bottom of the mold?

the primer is above the sheet which in turn is above the matrix. the punch passes through the premier (which therefore surrounds it)
Are you sure you understand how the mold works and what the primer needs?

in the office (they have been testing for a few weeks) they left me only with manuals and various notes...
then, the size of the mold, how should it be calculated? I mean, the width of the sheet, who decides? ?

Good luck!
Let me say, "employers"they would be hung out of the walls until the bones are whitened. :smile:

 

[Matricola_Gigi]

Thank you marcof for your answer.
Yes, I figured out how a mold works, but I have to figure out how to size the various pieces. I wanted to see if the primer has to press the whole sheet or just around the matrix contour?

 

[Lucky66]

Are you a studio or a builder??
You'd better take a ride in the workshop and see what a progressive mold is, because explaining how to design it is a little hard!
Hi.

 

[Matricola_Gigi]

Hey, we're in a studio. I took a tour of a company where they build, and I have a big mold. I repeat, I understood the operation of a mold, of screws, thorns, bushings, etc. what I would like is that some of you made me understand how big a mold can be, that is the maximum size.
How wide can the sheet be?

 

[Lucky66]

I'm sorry, but if you're in a studio, get a project done and study it!
How big is your question? depends on how the piece is, how many steps you need to make, single or multiple strip
no one will tell you how big the mold must be if you don't know first what you have to do.
Hi.

 

[Matricola_Gigi]

I'm already studying a drawing. If I have to quit to say, a piece 5 cm wide, can 2 one go side by side? 3, 5 or how many?? That's what I'm asking. thanks for the answers.

 

[Matricola_Gigi]

So? Can no one tell me anything about that?

 

[meccanicamg]

I think they're asking me to assume that you've never made molds and never designed a mold. I recommend handbook of die design where you can understand and see formulas and applications. some serious mold design manuals are also good. there are formulas to dimensional the lengths of the punches, the thicknesses of the base plates of the mold, the height of the dough primer/extractor, minimum forces to ensure on the extractor. practically you have all the sizing of all components.
the primer also called extractor serves to hold the sheet and/or slide it slightly during the hairstyle. it also serves to throw out the sheet from the punches and matrix that could remain stuck in the closed silhouettes. I think you need to see some project already realized. the maximum dimensions of a progressive mold give those of a press 10 meters x 10 meters and beyond.... depends on what you have to realize. sometimes they are flanked by n presses and switch from one to another. Other times everything is inside a single press.

 

[meccanicamg]

If you have a x ton press you will make a mold that optimizes the maximum strength of the press by making the maximum cuts at the best of the cost of the mold and especially according to the number of pieces to be produced per minute. I would say that these things are elementary and do not depend on molding because each production process of quantity follows the same rules

 

[Matricola_Gigi]

hello mechanicalmg and thanks for the answer. In fact they are cool in the cold printing industry. I want to take care of only cutting molds (not fine) step by step, with only one press. I've already been told a few things, look at the maximum productivity at the minimum cost. I repeat, I know in principle the functioning of such a mold, but on the manuals I read only speak of one form at a time. only on some notes there was something on more templates at a time, but he didn't say who decides the width of the sheet. In theory, then, if there's a 10m x 10m press, why not make all the molds of that size? Does this not come out the maximum number of forms at a time?
Thank you.

 

[meccanicamg]

not to make sheets of 10x10 meters because to work in continuous hairstyle we use rolls of sheet (coils) with non excessive widths. commercially carbon steel and stainless steel have maximum widths of 1500/1600 mm but are more comfortable rolls 100/200/500 mm wide. normally if you draw more details together serve to realize parts of the same final product. clearly if you have so many details to print together risks of having to use a mastodontic press. They usually tell you that they have a x ton press and depending on the perimeter you have a force and according to that you understand how many profiles you can cut together.
Usually mono-product molds are made because it is not said that always produce all forms together, depends on what the final customer has to produce.

 

[Matricola_Gigi]

you have been very helpful!! thanks!!! from what I have understood then, the standard sheets are from 100, 200 and 500 mm wide and from the perimeter of the figure I calculate the power that serves every step, right? Unless it's the contractor who tells us what kind of press he's gonna use and what's to do with the mold. Okay, okay, I'm starting to understand. .

 

[meccanicamg]

exactly. Remember that the widths of the rolls are commercial ones, so look for the companies that have the sledges as iron and steel gabrielli, sid Florentine, lsi etc.

 

[meccanicamg]

in its time I had made a mould to cut the pieces from 5 and 10 grams x the balancing of the wheels I had made a unique mold that simultaneously traced the two sizes from a 10 mm wide bar and thick 4 or 5 (I don't remember exactly). 10 mm sleigh material is difficult to find but can be done. the important thing is that the width is more than twice the thickness. However, there are many measures

 

[Matricola_Gigi]

from the sites of the companies you told me practically sell coils of variable width: They cut them to measure practically. So if you need 700 mm, can you always order?

 

[meccanicamg]

Of course, if you need 700 mm wide order and they produce the material you need for a number of coils you require.

 

[promecvergani]

but excuses me from the impression that you think a multi-piece progressive mold (i.e. cx2) functions as a plastic mold with 4o8o12o16 fingerprints? You're wrong to understand what it takes or what a progressive mold does
Hey, let me know.

 

[rinato]

Hey, gigi, if you allow me, I'd like to do some of your business.
What do you need to get from the mold? Can you post a drawing with some share?
What press do you have to design it for? not only the tons of power, but also the measures of the counter, the bat, the available racing, the cadence.
What annual consumption does the customer expect for that piece? If it's a small series, it's not said that you're getting/convening coils. sometimes they use strips obtained by shearing from the flat plates. . .
according to the required production, you can assume even more pieces at the stroke, if feasible technically and economically.
in practice you have to understand how much it agrees/needs to complicate the project.

only after a minimum of analysis of the specific case you can define how wide the strip must be. and in how many steps you have to get the piece.
and from these last data begins to understand how big the mold could become. which controls if there is in the press, ect.
and so on.

show more than one project, because each case is specific: The serial pieces are the ones you get, not the mold...
If you are planning to use a primer, you must put it in the bill of the power required to the press, as well as cuts/folds.
ect. ect. ect.
Good work, reborn.

ps. I started on board press... and still wrong today. . .

 

[Matricola_Gigi]

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