Stainless Steel Hinge Production Process

Our 3000m² factory focus on manufacturing quality Stainless Steel Hinges with a capacity of 400,000 pairs/month. Here we give a brief introduction of Stainless Steel Hinge Production Process.

Stainless Steel Cutting by Laser Cutting Machine

Typically, the raw material of stainless steel hinge are in the form of stainless steel sheet or coil. The first step is to cut it into small sheet according to the size of hinge.

Stamping Process

Stamp on stainless steel small sheet to get hinge leafs. Stamped hinges offer high quality, precision, and at lower cost than machined or extruded hinges, due to the efficiencies of progressive die metal stamping.

Stamped Stainless Steel

Piercing Process

Cutting holes in hinge through Press Machine 

Hinge after Piercing

Forming the Knuckles Step 1 

The knuckles (the part that wraps around the pin) receive their first forming operations Through Press Machine.

Forming the Knuckles Step 2 

2nd forming of the knuckles to shape round knuckles.

Operation of Forming the Knuckles Step 2 

Removing Sharp Edge of Hinges

After the previous operations, the edge of hinges are sharp and easy to tear anything that rubs against them. It is necessary to remove the sharp edge for safety and prepare for the next operations. 

Polishing Process

The two leafs of a hinge will be assembled as a semi-product hinge with a temporary pin before Polishing. Polishing is operated according to the desired finish, and preparing for plating if it will be applied. 

Semi-product after Polishing

Plating Process (optional)

Our hinges are plated through advanced plating equipment by our professional plating suppliers. Quality and stable plating finish is one of our advantages comparing to our competitors. 

Quality Inspection of Semi-product

100% inspecting the finish, the leaf, the holes, and the sharp edge whether they are passed for next operations.

Stamping Logo and Marks

Customized Logo or Certificate Marks are stamped on Hinges through Press Machine. 

Removing Temporary Pin Process

Temporary pins are removed from the semi-product hinge to prepare for final assembling.

Hinge Assembling Process

Hinge leafs, ball bearing, pin, and tips are assembled into a final hinge. Quality grease is adopted. No leaking, suitable damping. 

Hinge Assembling Process

Packing Screws Process

Screws are automatically packed through screw packing machine.

Machining Process

Manufacturing control box structure, solid valve body, water filter, copper connecting part.

Inspection of Final Hinge

100% inspection of final hinges. Qualified hinges are then packing into PP bags with a soft pad paper between two leafs. 

Packing of Final Hinge

Qualified hinges are packed into small box with screws. 

Carton Packing for Shipping

Small boxes would be packed into carton then strapped with strapping tape.