A kind of preparation method of fire door core board

Abstract

The invention discloses a method for preparing a fireproof door core board. MgCl2 is dissolved in a certain amount of water to prepare brine with a Baume degree of 25°Bé-27°Bé; Add ferrous sulfate and phosphoric acid and stir evenly; then add sodium tripolyphosphate, glue, modifier and carbon fiber and stir evenly again to obtain mixed solution A; mix foaming agent with water and fully foam to obtain mixed solution B. The present invention provides a cross groove and two arc grooves on the fire door core plate, and a cross-shaped steel plate and an arc-shaped steel plate are installed in the cross groove and the two arc grooves, so that the fire door can be improved. The strength of the core board. After the fire-resistant door core board prepared by this method is made into a fire-resistant door, the fire-resistant door will not be deformed after being burned in an open flame for 1.5 hours. Under the action of the curved steel plate, it can also effectively maintain the fire resistance for 1 hour.

Description

technical field [0001] The invention relates to the technical field of fire door production, in particular to a method for preparing a fire door core board. Background technique [0002] Fire doors are mostly made of fire door core panels. As we all know, fire doors made of fire door core panels can not only save the skeleton support, but also simplify the production process of fire doors, improve production efficiency, and reduce manufacturing costs. However, as far as the current two fire door core panels are concerned, the first one is made of aluminum silicate wool as the main material. Because its smoke toxicity index does not meet the national standard, it has been banned from use; The other is the door core board with expanded perlite as the main material. Due to the poor strength of perlite itself, after bonding with the steel plate or multi-layer board, the processing deformation of the thin steel plate, heat deformation, and collision deformation and other factors ...

AI Technical Summary

Problems solved by technology

However, as far as the current two fire door core panels are concerned, the first one is made of aluminum silicate wool as the main material. Because its smoke toxicity index does not meet the national standard, it has been banned from use; The other is the door core board with expanded perlite as the main material. Due to the poor strength of perlite itself, after bonding with the steel plate or multi-layer board, the processing deformation of the thin steel plate, heat deformation, and collision deformation and other factors , It is easy to cause the core board of the fire door to crack, thus affecting the overall performance of the fire door

During the transportation and installation process of the existing fire door core board, the core board is easily broken by the impact of external force. In the event of a fire, when the multilayer board is burned out, the fire door will fall apart by itself and lose its fire protection effect

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