They are mass produced on a vacuum forming machine.
Vacuum forming machine plans.
Ideal for prototyping packaging and short run production of larger parts.
Read more about building your own vacuum form machine.
If you want larger canopies or other vacuum formed parts build a larger plenum and plastic holder.
The plans are delivered digitally in pdf format.
There are plenty of large sheets of 02 03 thick pet g plastic that is great for vacuum forming clear canopies available from amazon.
Proto form vacuum forming machine plans.
Highly detailed construction plans for a larger vacuum forming machine used to mold flat plastic sheets into complex shapes by using heat and vacuum.
Construction plans for a larger vacuum forming machine.
Construction plans for a larger vacuum forming machine.
This is a very detailed build with lots of pictures and links to suppliers.
Information is included to build three sizes 24x24 24x36 and 24x48 inches.
While the mass production machines cost well over 100k you can build your own simple former for less than a 150.
If you want to make your own vacuum form machine this is a must read web site.
The results from this machine are fantastic.