Patent DE-102008058222-A1 (DE)
Title: Continuously producing fire-resistant door panels in the form of plates in a sandwich-like composite made of non-woven material and foamed hardenable pasty magnesium oxychloride mixture, comprises placing non-woven material on base plates
Inventor: HUANG XIAOKUAN
IPC: E06B5/16
Filed: 2008-11-19
Abstract: The method for continuously producing fire-resistant door panels in the form of plates in a sandwich-like composite made of a non-woven material as plate surface and a foamed hardenable pasty magnesium oxychloride mixture introduced between the plates, comprises placing the non-woven material on base plates (1), which are sequentially arranged in a transport device (9) that is moved in a transport direction (20), corresponding to a desired size of the plate for forming the lower plate surfaces, and applying the pasty magnesium oxychloride mixture as core material on the non-woven material. The method for continuously producing fire-resistant door panels in the form of plates in a sandwich-like composite made of a non-woven material as plate surface and a foamed hardenable pasty magnesium oxychloride mixture introduced between the plates, comprises placing the non-woven material on base plates (1), which are sequentially arranged in a transport device (9) that is moved in a transport direction (20), corresponding to a desired size of the plate for forming the lower plate surfaces, applying the pasty magnesium oxychloride mixture as core material on the non-woven material, placing the non-woven material on the pasty magnesium oxychloride mixture for forming the upper plate surfaces, preadjusting the plate thickness using a highly-adjustable pressure roller (7) lying on the upper plate surface, where the surplus introduced magnesium oxychloride mixture is pushed to the succeeding base plate against the transport device, finely-adjusting the plate thickness by a calibration roller (8), manually or mechanically separating the base plates where the band-shaped thickness-calibrated coating between the base plates is separated to individual plates, and separating the separated base plates from the transport device and then storing the base plates up to completely hardening the plates after which the plates are cut with the requirement of the desired delivery dimensions. The pasty magnesium oxychloride mixture is covered by an applied supporting fabric for mechanically reinforcing the plates directly after the first placing step and before the second placing step. The non-woven material and the supporting fabric are removed from the feed rollers displaceably arranged against each other above the base plates in transport direction and the distribution of the pasty magnesium oxychloride mixture is carried out by a funnel with a wide outlet slit arranged between the feed rollers of the glass mesh fabrics. Frame molds are sequentially arranged in a band shape with thicknesses of 20 mm on the base plates for the production of plates and are made of wood, steel or plastic, where an inner dimension of the frame molds are slightly larger than the desired plate dimension and longitudinal- and transverse sides of the frame molds are smaller than the desired plate thickness of the plates to be produced, so that the surplus magnesium oxychloride mixture is slightly pushed into the succeeding frame mold against the transport direction through the pressure roller over the transverse sides and the thickness of the plate is determined by adjusting the roller height of the pressure -and calibration rollers and is not determined by the height of the frame mold. The glass non-woven or non-woven is used as non-woven material and glass mesh fabric is used as supporting fabric, whose width corresponds to the plate width. The magnesium oxychloride mixture is produced by stirring 1 kilogram of turpentine soap in 40 liters of water, by dissolving 20 kilograms of magnesium chloride in the form of hexahydrate in equal portion of water to which a modifying agent containing 5% of fine pearlite and 2% of iron-II-sulfate is added in liquid form related to the magnesium chloride hexahydrate and by stirring 5 liters of diluted turpentine soap in 40 kilograms of magnesium oxide, where the mixture of magnesium oxide and turpentine soap is given in a predominant solution consisting of magnesium oxide by stirring to develop a uniformly foamed mixture. Additional pearlite (1-60%) and glass fiber (1-10%) with a length of 1-10 mm are added related to the magnesium chloride hexahydrate. Additional glass fiber (1-2%) with a length of 1-10 mm and kaolin (40-60%) are mixed related to the magnesium chloride hexahydrate, where the kaolin is partially or completely replaced by glass powder and the water quantity is correspondingly increased, so that the viscosity of the foamed mass to be prepared remains unchanged. Additional glass fiber (1-10%) with a length of 1-10 mm, aluminum hydroxide (10-60%) and magnesium hydroxide (10-60%) are mixed in any weight ratio related to the magnesium chloride hexahydrate, where the water quantity is correspondingly increased, so that the viscosity of the foamed mass to be prepared remains unchanged. Additional aluminum hydroxide (20-40%) and magnesium hydroxide (20-40%) are mixed in a weight ratio of 1:1 related to the magnesium chloride hexahydrate. An independent claim is included for a device for continuously producing fire-resistant door panels in the form of plates in a sandwich-like composite made of a non-woven material as plate surface and a foamed hardenable pasty magnesium oxychloride mixture introduced between the plates.