matrice o punzone

[stef_design]

hi to everyone, maybe the question will seem trivial but around you see so many:wink:
generally, when designing a mold for plastic components, do the injection point put it on the matrix or on the punch? ! ?
I also wanted to know why and what are the pros/compared with the two choices.

Thank you very much:

 

[zetaluca]

generally if possible (more than anything for aesthetic issues) in matrix.
if the area of the piece in matrix must be at all costs of high aesthetic quality you can inject even in part punch, with the disadvantage that the mold would compose and the price of consequence would increase.

 

[stef_design]

generally if possible (more than anything for aesthetic issues) in matrix.
if the area of the piece in matrix must be at all costs of high aesthetic quality you can inject even in part punch, with the disadvantage that the mold would compose and the price of consequence would increase.

but if injected in the matrix the expellers then suno on the sting side, then anyway something on the aesthetic side you see. because or see the expeller sign or see the injection point. Right? ?
Hi.

 

[SHIREN]

Hi.
in normal injection cwrca of rolling on the matrix
because the part of the mold that supports the punch and the one that normally is the mobile part of the mold
then the print remains in the matrix or acts to make it stay
then extract it with extractors

It is obvious that there are details that can also remain on the sting with carrot relatic or "hot channel"
all and always ingegnirized and industrialized in the phase of progress

the ultimate goal is always to produce aesthetic prints valid according to needs
at least possible cost
Thank you

 

[stef_design]

Hi.
in normal injection cwrca of rolling on the matrix
because the part of the mold that supports the punch and the one that normally is the mobile part of the mold
then the print remains in the matrix or acts to make it stay
then extract it with extractors

Let's see if with some questions I understand.
image 1: the injection is on the matrix side, but in this case it is the punch to move because it has the extractors.
is this configuration normal or is it usually the matrix side to move when the mold is opened? ! ?

image 2: In this case the injection is always on the matrix side. at the time of the opening of the mold, matrix and punch are firm, there is a 3 plate with the extractors. this configuration usually when using?!? and why didn't they put the extractors in the punch? ! ?

image 3: In this case the injection is on the punch. Is this configuration possible?!? would it be possible to print the object in figure (scholar) with injection in the punch? ! ?


Thank you so much, so far, for the delucidations.
Hi:

 

[SHIREN]

are all valid examples
There is only one to dwell on the third hypothesis
so long we always avoid it
at least in our type of moulds
we prefer to put a hot casting channel(torpedo)
that always offers us the dealer according to the type of the metter and the mold
in practice and a device that mechanically applies to the mold
in some cases where aesthetics are primary
with them you do not even notice that there is the injection point
also not to remain aloni of the extractors
you try to make a circumferential ring to the geometry of the piece that functions to extractor

in the specific "torpedes" not within
it takes a specific tec
Thank you

 

[stang64]

Hi.
not always the extraction of the printed piece takes place through extractors or punches, the piece can be extracted in cases of aesthetic needs even with the movement of the plates.
there are on the market normalized that allow hidden injections.

examples are valid but rather simple.

Say hi.

 

[apple]

in other cases, the extraction of the piece occurs with the use of compressed air; nozzles are placed in the mobile part of the mold, which detach the piece from the figure.

 

[zetaluca]

but if injected in the matrix the expellers then suno on the sting side, then anyway something on the aesthetic side you see. because or see the expeller sign or see the injection point. Right? ?
Hi.

Maybe I explained badly.
the extractors must always be in the punched part.
instead of using the hydraulic cylinder of the press fer make extraction, you have to mount on the mold 2 or more hydraulic cylinders in part injection, which move the coffee table that you will always mount in part injection.
I have already built several molds with this system, and they work very well.
In this way the matrix part remains without any sign.
ps the hot nozzle that spoke shrien is obligatory).
Hi.

 

[SHIREN]

in other cases, the extraction of the piece occurs with the use of compressed air; nozzles are placed in the mobile part of the mold, which detach the piece from the figure.

Hello apple
you can put in both situations
can also work to attack on the opposite side (push)
plastic injection
consist of a cylinder with conical cavity
and from an axiemated cone that under pressure is extracted
the air pipe should be applied.
Thank you very much

 

[SHIREN]

Maybe I explained badly.
the extractors must always be in the punched part.
instead of using the hydraulic cylinder of the press fer make extraction, you have to mount on the mold 2 or more hydraulic cylinders in part injection, which move the coffee table that you will always mount in part injection.
I have already built several molds with this system, and they work very well.
In this way the matrix part remains without any sign.
ps the hot nozzle that spoke shrien is obligatory).
Hi.

hi zeta....
for the hot channel I only mentioned
I don't go into the merits because I've never personally chosen the guy
to be inserted in the various moulds
if there are any users who would like to enlighten us and send us his experiences on the specific topic
It would make me happy
Thank you very much

 

[stang64]

hi, the type of hot channel and in particular of injectors varies according to the material that is used to realize the product, there are materials such as the pom that uses a type of injectors different from those used for the pa or pp.

the decision to use or not the hot channel, normally it is based also on the type and quality of the product but also on the strategy of those who will produce, how much investing in the mold can be decided only when you know exactly how this mold will make you earn.
the hot channel has a cost that, depending on this factor (guadagno) may seem high or irresistible.

Say hi.

 

[SHIREN]

hi, the type of hot channel and in particular of injectors varies according to the material that is used to realize the product, there are materials such as the pom that uses a type of injectors different from those used for the pa or pp.

the decision to use or not the hot channel, normally it is based also on the type and quality of the product but also on the strategy of those who will produce, how much investing in the mold can be decided only when you know exactly how this mold will make you earn.
the hot channel has a cost that, depending on this factor (guadagno) may seem high or irresistible.

Say hi.

Thank you
In fact, I've always been chewed
But if you want quality the hot canal is neessary
I've seen bottles for perfumes where the injection maybe you couldn't see it.
while with traditional carrots the halo is seen from a mile away
if you have more info
we are here to erude us and deepen the n/s baggage of experiences
Thank you very much

 

[stang64]

hi, in the limit of possible I will try to give (vi) information regarding molds, molding and everything that is around us, this is a very vast "field", surely every person who works in this field and who maybe has been working for many years, has accumulated a baggage full of information and experiences to transmit that is different from all others even if at the end the work is always that "injecting of molten plastic" in a block of iron.
I'm available, if there are any questions about molds, molding and everything else where I can be an open book...

not to forget that in the cost of a hot channel system that goes to kit of the mold, there is to add the expense for the purchase of the control unit that runs the hot channel and its injectors, it means that a good hot channel with filling of injectors plus the control unit with cables and various frills costs a good 30/35% of the total cost of the mold (not even too big or complicated) otherwise it rises vertis. but if you want quality this you have to pay.

not to forget the costs for the maintenance of these systems, spare parts etc..., these systems make well if you perform good and proper preventive maintenance.

Greetings.

 

[Mould Inventor]

But I see that there is a lot of confusion about the molds.
In fact everything when talking about injection molds is always better to talk about mobile part and fixed part and the injection is always partly fixed while the extraction is almost always in part mobile except for some cases where the investment or the particular product allows the realization of a reverse extraction through cylinders or referral.
the piece must always remain on the part where the estartion is realized, i.e. in most cases in part mobile.
then injection and extraction can be made in many of those ways that you can't assert anything, but each product is worthwhile.

other category are moulds with two-components or side injection or double injection in which that said before is no longer good.

 

[stef_design]

But I see that there is a lot of confusion about the molds.
In fact everything when talking about injection molds is always better to talk about mobile part and fixed part and the injection is always partly fixed while the extraction is almost always in part mobile except for some cases where the investment or the particular product allows the realization of a reverse extraction through cylinders or referral.
the piece must always remain on the part where the estartion is realized, i.e. in most cases in part mobile.

ok, then fixed part = matrix and mobile part = punch. Right? ?

 

[Mould Inventor]

ok, then fixed part = matrix and mobile part = punch. Right? ?

generally yes, but more correct to say matrix starts where there is no extraction and punch part where there is extraction.