Outdoor metal cabinet rust-proof mailbox with lock for delivering letters and other goods

Main Manufacturing process

1. Material cutting: use the plate shears to cut out the required sizes of cold-rolled steel plates (back plate, side plate, door plate, roof plate, exit plate, layer plate, etc.).
2. Stamping: use the punch machine to punch out the corner edge, handle and other positions that need to be reserved.
3. Bending: use the bending machine to fold the inside and outside edges.
4. Welding: reinforce with spot welding machine.
5. Polished: the surface of the solder joint polished, is smooth surface without burr.
6. Pickling and phosphating: put the welded file cabinet down the chemical tank for oil removal and rust removal.
7. Spray molding: semi-finished products enter the spray table and are sprayed with static electricity.
8. Assembly: assemble door, handle, key and other accessories.
9. Inspection: inspection by inspectors

10. Finished product: wrapped in paper.

Quality requirements:

A) Strictly calibrate and position materials to ensure the accuracy of material size.

B) Before welding: check again whether the material is damaged, dented or unequal in size;

C) In welding: false welding, missing welding and large welding scar are not allowed;

D) Before delivery, factory inspection or photo inspection can be carried out as required by the customer;