for mold experts.... .

[silvius]

a curiosity:

I've never seen the creation of a mold, so with a mold as an attachment, the size of a cordless phone is what are the various stages of work? which millimetres/types are used for roughing and finishing? How is polishing done?
http://www.cad3d.it/forum1/attachment.php?attachmentid=20630&stc=1&d=1302632358Thank you.

 

[SHIREN]

a curiosity:

I've never seen the creation of a mold, so with a mold as an attachment, the size of a cordless phone is what are the various stages of work? which millimetres/types are used for roughing and finishing? How is polishing done?
http://www.cad3d.it/forum1/attachment.php?attachmentid=20630&stc=1&d=1302632358Thank you.

Hi.
I think you should move the discussion to the specific area of industrial molding
where if you do a research on the construction modalities of a mold maybe some clarification you find
here we are in the area of "discussions off topics "
I don't know how to do it.
wait for the moderator to move
Thank you very much

 

[MBT]

Hi.
I think you should move the discussion to the specific area of industrial molding

That's it. :finger:
Sorry I'm late. Today I was around (at Passon, in Friuli... :wink

 

[Oldwarper]

then, some reminiscences of molds, although I have always made aluminum and not plastic.
The mold made like that, with that edge, it's absolutely not good. should be followed the undulating profile of the plastic case.
you need to predict injection point and seat (here I don't know how to help).
fixed and mobile matrix must be worked before hardening with a roughing that leaves at least 1mm on the figure parts for the subsequent processing. mainly spherical cutters are used to have a higher "costance" of overmetal. the toroidali are good for very linear and little tormented pieces in z. the diameters depend on the size of the piece and the machine, the largest possible. usually for un tormented roughnesses it stops at a d12-10. for the finishes, if you do not want to resort to electrodes and the geometry allows you also get to bulini d2 or even d1 (with high speed machines). but the times are biblical and for the multi imprints unacceptable.
after hardening in your case you end the parts of figure that you can easily work with the tools (also here toroidali) and the closing parts. in moulds like this, only closures are usually made.
the part of the figure is made with dip electroerosion with graphite electrodes, discharged in the closing parts where possible, previously worked on the cam. some can be copper (they consume less and can be reused more 'times, excellent for the multi imprint), but they cost much more ' both in terms of material and processing (copper is worked by skifo, graphite apart from the dust and' comparable.
polishing is mainly done by hand, I don't know if electrochemistry is possible. But many objects are "rust" of design, that is already obtained with electroerosion with different finishing degrees.

then there would be endless speeches on materials, molding machines, distortions, prototyping... It's a vast world.

for further details, I leave the field to "professional" molders.

 

[SHIREN]

for great linies the friend oldwarper tracked a path of feasibility of a mold
if you have specific questions no prob.
in truth we should start with the mathematical model
where to determine a proper hairstyle or piece silk.
and adjust the corners of the sheet and decide which part goes on the fixed side
and which part on the mobile side of the press
Therefore you decide which and how many extractors apply
below you must enter the collection of the material you need to use
This is just the beginning
Thank you very much