Creating 3D Enclosure for any PCB, 3D Print, or MOLDING 

• Altium -> Open PCB file->File->export->3D step
• Install DesignSpark Mechanical
• Create new project 

• Open step file In the created  project

• Select perspective view

• Select PCB surface

• Select plane view

• Draw rectangle
• Then hide PCB 

• Drag 5mm away from the original rectangle each left and the right sides
• Select MOVE and click on the edge line drag and type 5mm and press Enter 

• Create cornners 

• Select two edges and set 5mm and Enter 
• Do the same for all 4 corners 

• View in 3D

• Make it 1mm bigger
• Select pull-> double click the edge select all edges, Pull to the outer and set 1mm -> Enter

• Create the 2nd edge of the box 
• Press control Move to inner set 1mm and Enter 

• Now select and delete the middle 

• Measure the height of the box 
• Unhide the PCB 

• Select measure tool
• Select board surface
• Press Ctrl the select highest point among all 3D bodies

• 6.86mm
• Go for 10mm
• Hide the PCB again
• Select Pull 
• Select  Edge to pull up then set 10mm and Enter

• This upper part of the box
• Now do the lower part of the box
• Unhide PCB 
• The current Box design is as follows 

• Again measure tool and measure to the lowest part of the 3D bodies 
• Select the lower surface of the box

• Press CTRL
• Then select the lowest 3D body edge 

• It is 3.42mm
• Go for 8mm
• Select Pull
• Select  Edge to pull up then set 8mm and Enter

• Now box looks like this 

• Now make the cuts for connecters
• Goto plane view
• Hide all box parts, leave 3D PCB only 
• Plane view on connecter side (3D PCB should be able to click)
• Make two squares around the connectors, make the squire a little bigger than the connecter always 

• Now pull out of the box surface as shown below

• Now select the outside surface of the box go to the plane view draws two squares on the outer surface of the box as in the below picture. these squares are drawn on the box surface

• Now got to the 3D model we have to remove these unwanted surface now

• Select each unwanted surface and delete (you have to select the surface, not the edge line)
• Now you can start with creating cuts

• Delete those unwanted surface, now you have an opening for USB-C and battery connector

• Now make the top cover and the bottom cover
• Click the top edge of the box

• Plane view  draw of square 

• Goto 3d view 

• Delete unwanted outer parts

• Now hide all the surface and leave the lid  
• Now pull (this creates thickness to the lid) the lid part from the downside 1.5mm into the box

•  Move into the box a little bit 

• Do the same for the bottom plate 

• Now the box is completed 
• Save as PDF, this will create a 3D PDF, 

• Also, you can save it as an STL file for 3D printing 
• STL viewer