Galvanized Steel Prototype Cart with Moisture-Proof Insulation
Custom prototype cart assembly with galvanized steel profiles, galvanized sheet and stainless steel — 3D CAD design, welding and conventional machining, 1/16" accuracy in Baja California.
Challenge
A one-off prototype cart with a specialized design was required: galvanized steel profiles, galvanized and stainless sheet, with an insulated interior to keep water and moisture out. No off-the-shelf product existed, so it had to be designed from scratch and assembled with functional accuracy.
Solution
3D CAD design of the cart plus full in-house fabrication: material cutting, galvanized profile frame welding, conventional machining in 1018 and galvanized steel, sheet cutting, painting and final assembly with interior moisture insulation. Complete mechanical structure delivered, sealed and functional.
Process
- 1
3D CAD design
3D model of the prototype cart: profile frame, sheet cladding, covers and mounting points. Dimensions defined to 1/16" accuracy.
- 2
Material cutting
Cutting and prep of galvanized PTR profiles: layout, squaring and grinder cleanup for clean weld joints.
- 3
Frame welding
Tack-up, fixturing and welding of the frame on the table with squares and clamps. Squareness checked at every joint.
- 4
Sheet cutting
Galvanized and stainless sheets cut to fit each cart face, position-marked for cladding.
- 5
Painting
Surface prep and painting of body and frame for protection and a uniform industrial finish.
- 6
Assembly & insulation
Cladding, sheet fastening, machined base plates and interior insulation against water and moisture. Mechanical structure delivered ready to use.
Result
Prototype cart mechanical structure delivered, clad and sealed with interior moisture insulation. Assembly accuracy verified at 1/16" (1.5875 mm), with structural welding and a painted finish ready for service.
Gallery: before → after
12 images in chronological order, from design to final assembly.
3D CAD design of the prototype
3D CAD design of the galvanized steel prototype cart — specialized model
Cutting galvanized profiles
Cutting galvanized PTR profiles for the cart frame in the shop
Layout and cutting on the bench
Layout and cutting of profiles with squares and vise on the workbench
Grinder prep work
Profile prep with grinder before welding the frame
Welding the frame
Welding the cart frame with sparks — industrial welding
Tack-up and fixturing
Tack welding and fixturing of the frame with clamps and magnetic squares
Welded frame on the bench
Welded cart frame on the workbench in the shop
Assembling supports
Frame assembly with tacked vertical supports being checked
Finished welded frame
Welded galvanized steel cart frame — 1/16 inch assembly
Cutting galvanized sheet
Galvanized sheets cut to size for cladding the prototype cart
Cladding and base plates
Cladding the frame with galvanized sheet and machined base plates
Final painted, insulated assembly
Painted and assembled body with moisture-proof interior insulation — final delivery
Questions about this case
Do you build custom carts or enclosures?
Yes. We design from 3D CAD and build one-off prototypes in galvanized and stainless steel: cutting, welding, painting and assembly in Baja California. Send your idea or dimensions for a quote.
What accuracy do you hold on welded structures?
This prototype cart was built to 1/16" on assembly. Tighter tolerances are available for machined features — note it on your RFQ.
Can you insulate the interior against water and moisture?
Yes. On this project we clad with galvanized/stainless sheet and sealed the interior against leaks. Ideal for outdoor equipment.