Fire-proof door

Abstract

The invention discloses a fire door comprising a door panel, which includes an external covering layer, an inner core layer and a framework. The external covering layer completely covers the framework and the inner core layer; the external covering layer, the inner core layer and the framework of the door panel are wholly shaped by pouring molding; the external covering layer of the door panel is made from inorganic fireproof materials, the framework is made from plywood, and the inner core layer of the door panel is made from one or two of the following materials: rock wool, expanded perlite, and expanded magnesia material; the frame of the fire door is of two-layered structure, wherein the outer layer is made of inorganic fireproof materials and the inner core layer is made of plywood. The invention represents a significant improvement in the fire-protecting performance as well as the overall performance of the fire doors among fire-protecting products and is widely used in industrial and civil buildings.

Description

technical field [0001] The invention relates to the field of building materials, in particular to fire doors in fire products. Background technique [0002] Since the main materials of the fire doors in the prior art are wood material plywood plus inorganic board combination or metal material, the flame retardant and heat insulation effects are relatively poor, and the cost is also high; materials such as magnesium oxide, magnesium chloride, rock wool expanded perlite, etc. The flame-retardant and heat-insulating effects of fire-resistant materials are very good, the raw materials are abundant, and the price is cheap. There are also fire-resistant doors using these materials in the prior art, but there are some problems in the structure of these existing fire-resistant doors. For example: some fire-resistant doors are made of wood. Too many materials are used, and it is difficult to meet the requirements of fire performance. Some fire doors do not even cover the wood materia...

AI Technical Summary

Problems solved by technology

[0002] Since the main materials of the fire doors in the prior art are wood material plywood plus inorganic board combination or metal material, the flame retardant and heat insulation effects are relatively poor, and the cost is also high; materials such as magnesium oxide, magnesium chloride, rock wool expanded perlite, etc. The flame-retardant and heat-insulating effects of fire-resistant materials are very good, the raw materials are abundant, and the price is cheap. There are also fire-resistant doors using these materials in the prior art, but there are some problems in the structure of these existing fire-resistant doors. For example: some fire-resistant doors are made of wood. Too many materials are used, and it is difficult to meet the requirements of fire performance. Some fire doors do not even cover the wood materials at the door frame, or the material positions in different parts of the door leaf are not ideal, so they cannot play a good role in fire resistance. The flame and heat insulation effect cannot fully meet the requirements of fire protection performance, and further improvement in structure is needed to improve the performance of fire doors; the design of existing fire doors often ignores the fire protection design of the door frame, resulting in the door leaf being separated from fire but the door frame is not. The problem of fire; because the wood materials used in the existing fire doors are not treated, the overall fire performance of the fire doors is reduced, which cannot completely solve the problem of low fire performance of the fire doors; although some of the existing fire doors use Known flame retardant materials, but due to poor ingredients and craftsmanship, it is easy to warp, deform or ignite during use, which reduces the fire resistance level of the fire door, especially when the fire resistance test is carried out, the temperature rise on the back of the fire door is difficult to reach the standard ; In summary, a new type of fire door with comprehensive design for the frame and leaf structure of the fire door, the ratio of heat-insulating and flame-retardant materials, and its manufacturing process is needed.

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