How to make a plastic case for a prototype device?

Question

Design

Suppose I came up with a new type of smart vacuum cleaner, the prototype works, only without the body it is scary. Every household appliance has a plastic case. What software is used to develop a plastic design, where you can then cast it inexpensively? The size is up to 40x80 cm, so it is necessary, therefore it will not be printed in a conventional 3D printer, plus the strength will not be the same.

Answer 1

From free or inexpensive software - very simple DesignSpark Mechanical, more complicated, but more features - KOMPAS 3D Home. There are other monsters like SolidWorks that cost tons of money, but we're not pirates, right? :)
Regarding the large-sized case - most plastics for 3D printing can be glued if you need super-strength - you can print a mold and mold the case from molded plastic in it, some options have a hardness above 90 Shore. Here is an example of a very large case printed on a printer: 3dtoday.ru/blogs/gelroff/the-story-of-a-robot-or-t...

Answer 2

they order at factories
, they say in China they make it cheaply, they make it to order, etc.,
google it specifically ,
but I don’t know the software, even
it seems to me that the 3d model will go with the indicated dimensions