dimensional and geometric tolerances for sheet, plastic and glass

[davito]

hello to all and good 2017!
I ask you a hand because I don't come out alone. I usually find solutions to my problems on the forum, but this time I have to ask for specific help.
in the company we draw pieces obtained from mechanical processing, plastic pieces, plates and glass.
Until now we have used the same cartiglio for the various types of pieces, but recently came a new manager who asked me to make 4 different cartilages, specific for each type of piece, which vary in the specifications of dimensional and geometric tolerances.

- as regards mechanical processing, in the cartiglio I entered the norms en 22768, as also found in a thread on the forum. I'm fine here.
- as regards plastic parts, I have indicated the iso 8062, but I read them and concern the production of castings. I have found din 16901, but I would like to confirm that they are correct and perhaps Italian or European standards.
- as far as glass is concerned, I have read dozens of standards, but I have not found norms regarding dimensional and geometric tolerances.
I've read dozens of rules here, but I haven't found what I need (maybe in 22768 even for the sheet? ).

for what I understand the norms I can be different depending on the type of sheet, plastic or glass I use.
Can anyone help me?
Thank you.

Hello, David.

 

[davito]

no one who works plastic molds, or carpentry, or glass?
Thank you.
Hello, David.

 

[TECNOMODEL]

more than a specific norm according to me general tolerances (are those you talk about?) must be set according to the type of piece to be produced. then they are the specific ones of each quota that define the "critical" measures that require well defined tolerances.
a banal example: produced in plastic piece itself, which should not be mounted anywhere or coupled with other pieces, you can well use a general tolerance quite "larga" and do not indicate any tolerance in quotas.
always the same piece, but it has a place where an object is inserted. same speech first for general tolerances, then quoti and put tolerances in the premises.
still the same piece but 2 of them mate together to form a box. general tolerances that are shrinking, otherwise the exterior could be disallined, plus you will have a whole series of tolerances that will define the geometry of the gap between the two pieces.
In my view I would do different carts not depending on the material of the pieces, glass, plastic or sheet, but depending on the type of precision required by the particular one.

 

[MassiVonWeizen]

recently arrived a new manager who asked me to make 4 different cartilages

If he is a manager and if he has knowledge of the demands he has made, wouldn't it be more logical to ask for explanations to him?

 

[davito]

more than a specific norm according to me general tolerances (are those you talk about?) should be set according to the type of piece to produce...cut

Hello, thank you for the answer.
Yes, what I'm looking for are the general tolerances that regulate the different types of product, I need to know what standards to use for carpentry, for plastic parts (which then, indeed, could be diversified according to production methods, for example die casting, blowing, thermoforming...), and glass pieces.
for carpentry could be the uni en iso 13920:2000, but also the uni en 2768-1 and -2.
for plastic die castings could be the one 8062-1 and -2, but also din 16901
for glass pieces perhaps the uni en 1279-1:2004.
Thank you.
Hello, David.