make a 3d container

[Fere]

Hello, everyone.
I press that the dimensions of the container I attached are the internal ones and that the sheet will be 4 mm and two packs of this sheet (red ones) will have to overcome by 10 mm the other two packs (those yellow) to allow a better welding.
as it is designed I can immediately get the developments.
What I would like to do is turn everything into a solid 3d.
I tried to transform the various faces into regions and then extruded them with the extruded command present in modeling.
The problem is that by doing so, unrealistic junction points are created (see Annex b). which method can I use to remedy this?
for the realization of other containers of the same type, but without surmount I managed well with the command cheek, but in this case I do not think it can come back useful.
Can anyone give me any suggestions?
Thank you.

 

[lattu]

the joint points you have to extend them of 1 unit, join the faces and delete the excess parts to create a linear joint

 

[Fere]

How do I join faces if I don't turn them into a region and then extrude them?
with the region command and the use of the union command, nothing happens because they are two faces on different planes.
Is there a command I don't know to join two regions?

 

[lattu]

No, I apologized. I meant to join the faces after solidifying them and applying an extrusion of 1 in coincidence with the junction points.
after joining them you get a single solid to which you can eliminate excess faces

 

[Fere]

So, I try to recapture to see if I understand.
transform the two parts into the region (superior and lower).
extruded the whole of 1 mm
join the union command?
eliminate excess faces?

or

prolong at the junction point the two parts (superior and lower) of 1 unit
transform into region and extrude the two faces of 1
I join the union command.
eliminate excess faces?

 

[lattu]

create regions and extrudes of 4 mm,
get 2 separate solids,
extrude 1 mm the 2 adjacent faces at the junction point indicated by you,
join the 2 solids obtaining 1 only but not perfectly connected,
with the command deletes faces eliminate excess faces.

now I hope to have been quite clear

 

[lattu]

in the image below is indicated the result of the union of 2 solids and those dotted are the faces that you should eliminate

 

[Fere]

Bye.
Then I tried the ke procedure you advised me.
I attached the result. I think it's ok even if I wondered if it's normal if the joint line between the two solids of origin is inclined to 90° instead of being at the meeting point of the superior primitive solid (externally to the sheet I mean)? I don't know if I was clear?
cmq thank you very much

 

[lattu]

depends on the fact that the lower part has a flank inclination towards the inside, which causes a misalignment of the vertices.
it is right so, proceed also with the other faces