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Step 1: Welding input, material storage cage

Procure raw materials from major Japanese steel manufacturers and prepare them for production in order to meet customers' demands

Step 2: Front mold (Forming)

"Create the first form
*We use a looper made in Japan to reduce line stoppage time and improve production efficiency "

Step 3: High-frequency welding

Weld two edges of steel plate to create a tube shape

Step 4: Sizing

Shape the tube according to the required diameter

Step 5: Automatically truncate

Cut tubes to the length required by customers

Step 6: Lathe the tube end

Clean two ends of tubes after cutting

Step 7: Packing

Finished product packaging

Step 1: Input raw material

"Procure raw materials from major Japanese steel manufacturers and prepare them for production in order to meet customers' demands

Step 2: Acid cleaning

Coil is continuously put into 6 tanks for cleaning with HCl acid solution, acid solution after cleaning will be taken out of to the acid regeneration treatment system

Step 3: Water cleaning

After acid cleaning, coil is transferred to hot water cleaning line

Step 4: Put coil into the storage cage

After completing the above 2 steps, coil is put into the storage cage for next steps

Step 5: Edges cutting

Coil is cut according to requirements and rolled out to calculate the weight

Step 6: 6-high cold rolling mill

"Coil is transferred to the continuous Pay off reel to prepare for the 6-high cold rolling process (2 presses, 2 intermediates and 2 rolls), this process produces coil rolls with thickness depending on customers' requirements

Step 1: Input raw material

- Material is input into the Pay off reel for continuous production line
- After Pay off reel, coils are connected together for continuous production

Step 2: Pretreatment of NaOH

Treatment with NaOH alkaline solution for the coil to be clean before heat treatment

Step 3: Furnace heat treatment

Coil is treated by direct and indirect heat to clean surface out of impurities, ensuring the adhesion between steel sheet and zinc aluminum layer, and to meet requirements on the elongation for different materials

Step 4: Galvanizing, 55% Al-Zn

- Galvanizing, 55% Al-Zn as requested
- Ensure the galvanizing level according to customer's requirements

Step 5: Cool down

Cool the plate temperature down

Step 6: Surface treatment

- Surface treatment with Skinpass, Tension Leveller, Resin (Anti-finger)
- Treating the coil surface with Anti-finger or Skinpass then transfer to color-coating line

Step 7: Finished product

Wrap the coil according to the weight required by customers

Step 1: Input raw materials

- Input raw materials into manufacture line to prepare for the production
- Connect 2 material rolls for continuous production

Step 2: Entry Looper

The cage stores materials to connect the coil so that the production line works continuously

Step 3: Surface cleaning

Clean material surface with iron brush to increase adhesion then clean with hot water

Step 4: Chromium coating

The purpose is to protect the coil surface from oxidation, and to increase the adhesion between the coil surface and paint coating layer

Step 5: Apply paint layers

- Top coating
- The primer coating is between the material surface and the finished paint layer on top
- Coating the paint on the backside

Step 6: Tension Leveller

Through many production stages, the coil shape is affected that needs to be fixed

Step 7: Exit Looper

Cage for storing finished color-coating coil for the production line continuity

Step 8: Wrap the coil roll

Wrap according to the weight required by customers