injection moulding component with holes

[Meteor02]

Forgive me. . Maybe in plastic everything is fine, but I would never do a job like that. if it grips the hamster and madonne to pull it out and ruin the hole as well.
Perhaps I would put a telescope or compass on it, so that in case of grip it is easy to remove everything.
Obviously the telescope or compass implies a system of platelets to block everything.
The conical hole, if you infiltrate the dirt, give today tomorrow.. the scrolling pin remains backward and therefore creates a gag.
that to say.. that your inexpensive depends on the characteristics of the piece you have to produce and especially on the daily numbers of printed with consequent machine stop for maintenance and scrap of pieces.
in any case the cylinders and the ends do not give them to you.
If you need to print an object that goes into a wall.. Everything is fine

It's not that everything's okay in plastic, but it's just like that. I don't know what printers you have to deal with, but give today and tomorrow the molds clean regularly and if you die as god commands the gases that go dirty are really negligible. is a pivot that flows 1/2 times a minute not a piston at 5000 laps does not grip. to make a hole you do not need to end it is enough to calibrate the thickness of the piston, in plastic to make stupid holes you can also use air pistons (I put one in photo) and do not trouble even those figurative if it grips a hydraulic piston. maintenance and discards with 2 pistons you do not have, with a closure to shave as hypothesized you must predict periodic maintenance to resume the surfaces to rub. for this the advice when one has to make a mold is always the one asked the printer easily in his career will have seen all the available solutions and many will have tested and evaluated in production.

 

[Vittorio]

operating in aluminum die casting, certainly less permissive than plastic.
in my sector is inconceivable.
Everything must be safe. the ends serve because they have to give consent to the extraction of expelling the piece.
if the pin does not fall for reasons of malfunction of the hydraulic cylinder.. A disaster happens.

 

[francescodue]

I saw the discussion resumed.
However, it seems to me that it is now moving on how to make holes and what is the best solution.
But the starting post was not so definitive. It seems to me that different solutions were given to avoid any movement, only a mold open and close, and that they had been well accepted.
in the past I worked in a company that produced similar plastic details (abs and pp) and I often used solutions like the one indicated. in the fin zone, where there is the male-female intersection (or sting-matrix if you prefer) I used always abundant sforms around 3-4 degrees. but I also have to use sforms lower than the degree. Everything worked. at most a few bavettas after a few dozen thousand pieces. much depends on the quality with which the mold is built.

 

[Colo90]

operating in aluminum die casting, certainly less permissive than plastic.
in my sector is inconceivable.
Everything must be safe. the ends serve because they have to give consent to the extraction of expelling the piece.
if the pin does not fall for reasons of malfunction of the hydraulic cylinder.. A disaster happens.

victorious, less permissive depends on the points of view.
type at the level of closures is much more permissive the die casting (seen that have almost always connected the die cutting mold), in the thermoplastic sector are not allowed bave since once detachment the piece is finished (in fact the polishing is made in mirror).
on the movements same thing, avoidances are not possible due to the type of material, while in thermoplastic no problem.
on the subsquadri, even here more permissive the thermoplastic where it is practice, in the die casting are granted small subsquadri only in specific cases (on the pieces) while on the castings are going to hold the piece in mobile.
I think I've discovered the "Pandora Vase" (?).

 

[Vittorio]

I think I've discovered the "Pandora Vase" (?).

:roflmao::roflmao::roflmao:

far from me to diminish those who make moulds for plastic :roflmao: and permissive was related to the type of project of the example of @meteor02I have not made many plastic molds, but I know that surfaces and closures are more toasted than aluminum die casting.
against aluminum die casting has its difficulties to obtain certain tolerances on castings, materials and thermal treatments more challenging than plastic.
Now the moulds have become machines, there is not only the difficulty of obtaining in negative complex geometric shapes, there is also a lot of technology to obtain more and more efficient castings.
All right. I came out a little bit of the theme, but it was to close the pandora vase.

 

[Meteor02]

operating in aluminum die casting, certainly less permissive than plastic.
in my sector is inconceivable.
Everything must be safe. the ends serve because they have to give consent to the extraction of expelling the piece.
if the pin does not fall for reasons of malfunction of the hydraulic cylinder.. A disaster happens.

In this case where the pistons are partly fixed nothing happens (the extractors are partly mobile) if the piston remains in the mold retains the piece in part fixed it will be enough to activate the piston and release the piece manually, I imagine if the piece was aluminum it would be more difficult to free it manually for this advice always to ask one of the sector the problems are different even if we talk about molds. explain to me this obsession for malfunctions in 35 years of work I will have happened 3 times 2 of which because of the operator, on the contrary often they are the magnetic limit to create problems of leggo I do not read now I prefer the old micro, 10 euro little expense so much yielded ...

 

[Fabietto]

ciao @meteor02 only by curiosity, and to give a proper place to your solutions,
in which sectors does your company work? automotive, white, housewives, medical, electronic, or what else?
In the case of you, nothing happens. .
If the piston does not open, and the piece remains in matrix, it is not always easy to remove it from the matrix, with danger of ruining the matrix.
Moreover, if in punch there are ribs, subsquadri etc, it is a beautiful struggle to pull between matrix and punch. It is true that it is plastic, and that it tears, but I think you know well that you can do damage. .

 

[Fabietto]

last note,
is always a nice talk of better solutions, and we technicians are in love with our perfect machine projects, but unfortunately for years to this part we have to meet with the worst of our enemies -> how much the customer is willing to pay the mold (or equipment).
this point spy, downward, any good intention of us to make the perfect project. .

 

[Vittorio]

explain to me this obsession

what you call obsessionI call it possible disasters.
but not only economic.. . also for people working near the mold.@face has already made you a summary of the troubles that there are if a print remains in the opposite part, especially when there are robots that manage the full cycle.
definitely yours is a sector that everything is accepted and so you are not obsessed

 

[Meteor02]

what you call obsessionI call it possible disasters.
but not only economic.. . also for people working near the mold.@face has already made you a summary of the troubles that there are if a print remains in the opposite part, especially when there are robots that manage the full cycle.
definitely yours is a sector that everything is accepted and so you are not obsessed

Fabetto exposed what could happen if there were, hypothetical situation that should be evaluated mathematics at hand. in the specific case there are no impediments whatsoever. if there were you could assess an alternative path.

 

[Meteor02]

ciao @meteor02only by curiosity, and to give a proper place to your solutions,
in which sectors does your company work? automotive, white, housewives, medical, electronic, or what else?
In the case of you, nothing happens. .
If the piston does not open, and the piece remains in matrix, it is not always easy to remove it from the matrix, with danger of ruining the matrix.
Moreover, if in punch there are ribs, subsquadri etc, it is a beautiful struggle to pull between matrix and punch. It is true that it is plastic, and that it tears, but I think you know well that you can do damage. .

hi fabietto at the moment we are an accountant company take what passes the market we work from automotive to medical we do not rely on a single sector, before the pandemic went a lot the bathroom furniture from after covid to last year was pulling a lot the agricultural sector this year goes more the luxury home industry. from thirdists try to always ride the best wave/piu profitable.
my goal is not to create the perfect machine but to create the machine suitable for the purpose that you agree to the customer and the printer (which I am) when I am satisfied, I think more important to dimension the project according to the real need of the customer, how many pz year? How many years of life? desired quality level? product cost? budget project? etc when you have the right info you can evaluate how to get the best quality/price/performance ratio. Specifically the first photo is of a Russian mold of an industrial steam stretcher pedal the second photo is of a mold for a hinge that holds the glasswork of a heavy medium.