plastic parts moulding

[Daniele-san]

hello to all and especially good year to all!!!! :finger:

can you tell me if there are standards or similar about the tolerance of the rebaves related to details printed with palstic materials?

Thank you.
Hi.

 

[gianluigi]

Hey, daniele-san, if you're putting your problem in practice, I could help you solve the gag.
You're a thermoplastic printer. ?
a tool or a designer.
Hello gianluigi

 

[Therapy?]

hi I usually limit myself to putting on the drawing a note of the type: the piece must be free from the bave (says everything and nothing and it only serves to pararsi the butt with the supplier)

often it is a question of tuning the mold/printing and this must be demanded by the supplier also should be paid attention in the phase of design mold not to put (if possible) the mold closures where the trunks could create problems

recently thanks to a German supplier I discovered that there is a quotation symbol that indicates the maximum size of the admissible basin on the molding of a thermoplastic if you want to place an image

n.b.
exists on the forum the stamping section perhaps it is more correct to put the discussion there

 

[Therapy?]

here is the image
the symbol is placed as a general note at the bottom of the drawing
as regards general tolerances just look if there is written something about it in the norm you use as a reference

 

[Daniele-san]

Hey, daniele-san, if you're putting your problem in practice, I could help you solve the gag.
You're a thermoplastic printer. ?
a tool or a designer.
Hello gianluigi

Hi.
thanks to your intervention I am a designer, I usually insert a generic note by writing that the particular must not have rebates but as we all know a minimum of rebaving on the mold churus there is always and I would like to quantify it with a tolerance (better if there is a standard to refer to)
Thank you.
Good job

 

[Daniele-san]

here is the image
the symbol is placed as a general note at the bottom of the drawing
as regards general tolerances just look if there is written something about it in the norm you use as a reference

Hello therapy?
thanks to your intervention and your suggestion,
I also usually in a generic indict that the particular must be free from rebave... but rightly the note says everything and says nothing because at the end of the accounts the particular comes out with a minimum of rebate that I would like to quantify with a tolerance or better with a standard if it exists.
However referring to the symbol you have indicated to me you know if it comes from a standard? ...will you be able to inform you?

the tolerances indicated in the symbol are:
Max.4 height?
-0.1 maximum depth?
Could you give me precise directions?
Thank you.
Good job.

 

[Therapy?]

but look sincerely I tell you that we have "discovered" when the nost quality has reported that there were bays on the piece to the German supplier who promptly told us that their design reported the symbol and its tolerance was respected (+0.4 is the maximum protrusion of the bava while -0.1 is on the contrary a recess: in our case it was spigoli viviso so imagine a very small s
sincerely I did not know what norm it refers to and at the time I had found some explanations just in a cad3d forum or anyway on the internet while on the technical drawing manual I found nothing

 

[IPdesign]

if I can enter the dilemma (from thermoplastic mold designer) the problem of the bave is always present .
as rightly said a little gag is always there and many times not so small.
everything depends on the piece in question, if for example for a bumper 0.4 could be acceptable, the same value on a component type a 3 x 3 mm calculator key becomes a huge defect .
I have customers who control the beams with a 50x magnification optics (micro-valves )
said this the word "unallowed" placed generically on the whole piece is how much more wrong you can do .
the designer should be able to direct the molder in the choice of the best closing for the mold, therefore if I have an important edge that can absolutely not have bave I will have to provide specific indications to the molder so that you do not make the mold closure just in that position. many times just a very light bevel to allow a division in more appropriate areas.
I have customers who turn to me only for the industrialization of the component; I'll explain better, I'm given the detail to print just designed complete with assembly where it has to be inserted, I'm given the task that the piece has to perform and I'm taking care of adding moldings, setting the closures, simplifying the geometry for molding purposes.
to many customers seemed a useless job, a waste of resources, but when after my intervention the mold reduced its cost by 30% well they paid the invoice with less agitation .:biggrin:

with this I do not want to say that you are wrong on the whole line, indeed, but many times it would serve greater interface between who designs and who realizes.

I hope I haven't bored you

good work at all

 

[Daniele-san]

but look sincerely I tell you that we have "discovered" when the nost quality has reported that there were bays on the piece to the German supplier who promptly told us that their design reported the symbol and its tolerance was respected (+0.4 is the maximum protrusion of the bava while -0.1 is on the contrary a recess: in our case it was spigoli viviso so imagine a very small s
sincerely I did not know what norm it refers to and at the time I had found some explanations just in a cad3d forum or anyway on the internet while on the technical drawing manual I found nothing

as I had imagined
thanks to your therapy intervention
If you have any news, let me know what I would like to do, I would like to ask my trusted molders if they know the symbolism and possibly the appropriate standards.
Hi.
Good day

 

[Daniele-san]

if I can enter the dilemma (from thermoplastic mold designer) the problem of the bave is always present .
as rightly said a little gag is always there and many times not so small.
everything depends on the piece in question, if for example for a bumper 0.4 could be acceptable, the same value on a component type a 3 x 3 mm calculator key becomes a huge defect .
I have customers who control the beams with a 50x magnification optics (micro-valves )
said this the word "unallowed" placed generically on the whole piece is how much more wrong you can do .
the designer should be able to direct the molder in the choice of the best closing for the mold, therefore if I have an important edge that can absolutely not have bave I will have to provide specific indications to the molder so that you do not make the mold closure just in that position. many times just a very light bevel to allow a division in more appropriate areas.
I have customers who turn to me only for the industrialization of the component; I'll explain better, I'm given the detail to print just designed complete with assembly where it has to be inserted, I'm given the task that the piece has to perform and I'm taking care of adding moldings, setting the closures, simplifying the geometry for molding purposes.
to many customers seemed a useless job, a waste of resources, but when after my intervention the mold reduced its cost by 30% well they paid the invoice with less agitation .:biggrin:

with this I do not want to say that you are wrong on the whole line, indeed, but many times it would serve greater interface between who designs and who realizes.

I hope I haven't bored you

good work at all

Thanks for your intervention!
all logically what you have written and I fully agree:
would you like to tell me that the total cost of your advisory at the cost of the industrialized mold would cost less than the design and construction of a non-industrialized mold (or industrialized evil)?
Hi.
Good job

 

[Therapy?]

Thanks for your intervention!
all logically what you have written and I fully agree:
would you like to tell me that the total cost of your advisory at the cost of the industrialized mold would cost less than the design and construction of a non-industrialized mold (or industrialized evil)?
Hi.
Good job

excuse daniel-san does not know what is the difficulty of the pieces in question but usually if you involve the designer molds will give you the same solutions as a consultant (I don't want to ipdesign) without paying advice since then you do the job
also developing solutions together with the mold designer learns many things (maybe you take a ride even in the workshop) and you will see that you will design the piece already with the sforms, with constant thicknesses to avoid retreats, without subsquadri and you will already have in mind how the mold will be made (chiusure, possible movements etc.).
....unless you plan a piece to do in wool but at that point advice costs you more than the mold.....
Hi.

 

[IPdesign]

Thanks for your intervention!
all logically what you have written and I fully agree:
would you like to tell me that the total cost of your advisory at the cost of the industrialized mold would cost less than the design and construction of a non-industrialized mold (or industrialized evil)?
Hi.
Good job

As he rightly pointed out therapy (I don't want it:biggrin, the industrialization of the product is almost always decided in concert with the designer molds, and usually falls into the general cost of the mold (it is quantified however, it is not homage :biggrin: ).
I myself when I execute the design of the mold I interface with the client to request information of the case.
This work is usually done with customers acquired with whom you have a good relationship maybe consolidated for years.
in recent times, however, there is always a greater research to the supplier with the best price and therefore usually ask for offers to more companies and these provide a quotation based on what they receive as a model; This way of doing has led to a positive outcome percentage on very low estimates and of course a company tries to lose as little time as possible in this practice.
it goes by itself that if your usual supplier first called you to ask you information about what he believes inconsistencies, or better still came in your study to discuss solutions and modifications, now it is limited to making you the offer as it is with the intention in case of acqusition of the order to better assess the job.
In addition, many moldists avoid providing suggestions until order acquisition to avoid facilitating competition.

that is why many companies per product of a certain relief or with high productions aim to have already an optimized piece to subject to their pink of suppliers.

 

[Daniele-san]

As he rightly pointed out therapy (I don't want it:biggrin, the industrialization of the product is almost always decided in concert with the designer molds, and usually falls into the general cost of the mold (it is quantified however, it is not homage :biggrin: ).
I myself when I execute the design of the mold I interface with the client to request information of the case.
This work is usually done with customers acquired with whom you have a good relationship maybe consolidated for years.
in recent times, however, there is always a greater research to the supplier with the best price and therefore usually ask for offers to more companies and these provide a quotation based on what they receive as a model; This way of doing has led to a positive outcome percentage on very low estimates and of course a company tries to lose as little time as possible in this practice.
it goes by itself that if your usual supplier first called you to ask you information about what he believes inconsistencies, or better still came in your study to discuss solutions and modifications, now it is limited to making you the offer as it is with the intention in case of acqusition of the order to better assess the job.
In addition, many moldists avoid providing suggestions until order acquisition to avoid facilitating competition.

that is why many companies per product of a certain relief or with high productions aim to have already an optimized piece to subject to their pink of suppliers.

all true what you write!:finger:

 

[Daniele-san]

excuse daniel-san does not know what is the difficulty of the pieces in question but usually if you involve the designer molds will give you the same solutions as a consultant (I don't want to ipdesign) without paying advice since then you do the job
also developing solutions together with the mold designer learns many things (maybe you take a ride even in the workshop) and you will see that you will design the piece already with the sforms, with constant thicknesses to avoid retreats, without subsquadri and you will already have in mind how the mold will be made (chiusure, possible movements etc.).
....unless you plan a piece to do in wool but at that point advice costs you more than the mold.....
Hi.

Thanks therapy,
Usually we as a company rely on the advice and experience of the designer molds within their workshop and not to an external consul.
:4441:
but nn sempère manages to do what you would like... .

 

[enri]

attention because then to quality control the "mucica and saventa"!:biggrin:

 

[Daniele-san]

attention because then to quality control the "mucica and saventa"!:biggrin:

I do it for him so he does not expire:36_1_28:
and does not waste time with non-compliance reports :mixed:

Hello

 

[enri]

instead of mad with pro-and I suggest supply to the respossable quality of cutter to trim all the smudges of the injection, if not that responsible is?:biggrin:

 

[Daniele-san]

instead of mad with pro-and I suggest supply to the respossable quality of cutter to trim all the smudges of the injection, if not that responsible is?:biggrin:

He's just responsible for himself!
and for the cutter I fully agree! :finger: