Mixed extrusion system and mixed extrusion method for production of A2 or B1-grade fireproof plate

Abstract

The invention discloses a mixed extrusion system and mixed extrusion method for production of an A2 or B1-grade fireproof plate. The mixed extrusion system is adopted in the mixed extrusion method. The mixed extrusion system comprises an internal mixer, a main extruder, a feeder and a screw feeder. The feeder is arranged on the upstream portion of the internal mixer. The discharging end of the feeder is connected with a feed opening of the internal mixer to be used for supplying a raw material for producing an A2 or B1-grade fireproof core layer into the internal mixer. A discharging opening is formed in the bottom of the internal mixer and is connected with a feeding opening of the screw feeder. A discharging opening of the screw feeder communicates with a feeding opening of the main extruder. A core layer sheet forming mold used for extruding and forming the fireproof core layer is arranged at the discharging end of the main extruder. By means of the mixed extrusion system, the A2 orB1-grade core layer can be produced better, the production efficiency is improved, process control is simpler, and the core layer is denser.

Description

technical field [0001] The invention relates to a mixing extrusion system for producing A2 or B1 grade fireproof boards, and also relates to a mixing extrusion method using the mixing extrusion system. Background technique [0002] In the production process of A2 or B1 grade fireproof board, there are mainly two ways to produce the core layer. For A2 non-combustible grade fireproof board, A2 non-combustible grade core material rolls are generally used for molding, and the purchased A2 non-combustible grade The first-grade core material is unwound and then adhered to the polymer film on the front and back surfaces, and then the core material is combined with the upper metal plate and the lower metal plate. However, this production method needs to be purchased for the core material roll, which is costly. After forming, the polymer film is adhered on the surface, so the adhesion is poor and the glass strength is poor. For the production of highly flame-retardant B1-grade firep...

AI Technical Summary

Problems solved by technology

[0002] In the production process of A2 or B1 grade fireproof board, there are mainly two ways to produce the core layer. For A2 non-combustible grade fireproof board, A2 non-combustible grade core material rolls are generally used for molding, and the purchased A2 non-combustible grade The first-grade core material is unwound and then adhered to the polymer film on the front and back surfaces, and then the core material is combined with the upper metal plate and the lower metal plate. However, this production method needs to be purchased for the core material roll, which is costly. After molding, adhere the polymer film on the surface, so the adhesion is poor and the glass strength is poor

For the production of highly flame-retardant B1-grade fireproof boards, it is generally necessary to purchase high-flame-retardant finished plastic granules, and then put them into the main extruder, where they are heated, stirred and extruded. However, since the highly flame-retardant plastic particles are also mixed with a certain amount of inorganic substances, the plastic particles must be heated and melted in the main extruder before being stirred, so the production speed is very slow, and in the main extruder The mixing effect of medium stirring is not good, the uniformity is poor, and the heating temperature and stirring speed are difficult to control, the process control is difficult, and the density of the core material is poor. Therefore, the high flame retardant B1 pellets are not suitable for the current situation of ordinary production line extrusion.

Images