Steel fire door raw materials are the main what

- Apr 16, 2019-

Steel fire door is a relatively common fire door products, in the fire performance has unparalleled advantages, is a lot of requirements for the preferred fire zone.

Door manufacturing process: according to the technology department processing single detail dimensions, specifications, the raw materials to 1.2 mm galvanized steel belt, punching, bending, welding, grinding, pickling derusting (water) chemicals, coating, coating (to the electrostatic spray coating equipment workshop, plastic powder spray on surface of door frame, the coating equipment bake, within 180 ℃ to 205 ℃ high temperature melting plastic powder), paste fire expansion and film packaging.

Doors manufacturing process: according to the technology department processing single detail dimensions, specifications, the raw materials to 0.8 mm galvanized steel plate cutting, punching, bending, filling materials filling material using perlite door core board (14 kg / ㎡, polyurethane foam rubber), resistance welding seam, hot press finalize the design, door leaf cover plate molding, pickling derusting (water) chemicals, coating, coating (to the electrostatic spray coating equipment workshop, plastic powder spray on surface of door frame, the coating equipment bake, within 180 ℃ to 205 ℃ high temperature melting plastic powder), plastic film packaging.

National standards on the fire door lap size of the gap has clear requirements: on the steel fire doors, the requirements of the fan and the door frame lap joint shall not be less than 10mm, between the two sides of the gap between the fan and the door frame shall not be greater than 4mm.After the fire door is installed and closed, the gap should not be too large, otherwise, it is difficult to ensure the sealing performance of the fire door, and it is difficult to reflect its function of restraining fire and smoke spreading under fire conditions.


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