Feeding device for flame retardant xps extruded foam board

Abstract

The invention relates to a feed device for production of flame-resistant XPS plastic extruding foam boards. The feed device is characterized by comprising a screw extruder (1), a feed hopper (2), a first hopper (3), a second hopper (4) and a frequency conversion feeder (5), wherein the feed hopper (2) is arranged at a feed opening of the screw extruder (1); a discharge opening in the bottom of the first hopper (3) is positioned in the left half part above the feed hopper (2); a discharge opening in the bottom of the second hopper (4) is connected with a feed opening in the frequency conversion feeder (5), and a discharge pipeline opening of the frequency conversion feeder (5) is positioned in the right half part above the feed hopper; and PS granules (6) are placed in the first hopper (3), and a fire-retardant premix (7) is placed in the second hopper (4). The feed device disclosed by the invention has the advantages of simple and flexible production technology, safe production and low cost and being capable of producing products with good flame resistance.

Description

technical field [0001] The invention relates to a feeding device for a flame-retardant XPS extruded foam board. Background technique [0002] XPS extruded foam board (extruded polystyrene foam board) has a closed-cell foam structure, so the thermal conductivity is small and has excellent thermal insulation performance. It is the first choice for various thermal insulation structures, but XPS extruded foam board is easy to Inflammable, the fire will ignite, so it is necessary to add a flame retardant to make it flame retardant. Expandable graphite, coated red phosphorus and other compound flame retardant XPS extrusion foaming can make the foam material reach the flame retardant B1 level, which can replace the toxic hexabromocyclododecane flame retardant. [0003] There are two traditional production methods of adding flame retardants: [0004] The first production method is to make TCPP and expandable graphite or add red phosphorus into a paste, and use a special pump to in...

AI Technical Summary

Problems solved by technology

[0008] 3. Since the PS pellets and the flame retardant are mixed quantitatively, it is inconvenient to increase or decrease the flame retardant to adjust the foam molding process or change the flame retardant performance during production. It is necessary to wait until the material in the barrel is used up. Then feed the material after adding or subtracting the flame retardant into the barrel

lack of flexibility in process

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