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CN-121973416-A - Production method and equipment of marine electrical fireproof material

CN121973416ACN 121973416 ACN121973416 ACN 121973416ACN-121973416-A

Abstract

The invention provides a production method and equipment of a marine electrical fireproof material, wherein the production method comprises the steps of S1 drying raw materials, S2 preparing master batches under a low-temperature condition, S3 performing high-temperature solidification through melt molding, and S4 performing post-treatment. The production method can effectively prevent the cracking of the carbon layer, remarkably improve the high temperature resistance of the material and realize the uniform dispersion of the refractory component in the resin matrix.

Inventors

  • DING XIAODONG
  • WANG YUMING
  • LUO CHAO
  • LI WEI
  • WANG PAN

Assignees

  • 青岛巨星机械模具有限公司

Dates

Publication Date
20260505
Application Date
20260209

Claims (8)

  1. 1. A method of producing an electrical fire protection material for a ship, comprising: S1, drying the raw materials, namely drying inorganic components at 120-150 ℃ for 4-6 hours, and vacuum drying resin, compatilizer, curing agent and the like at 80-100 ℃ for 3-4 hours; S2, preparing master batches at a low temperature, mixing raw materials at a temperature of not more than 60 ℃, then carrying out low-shear extrusion granulation by a double-screw extruder, cooling by 20-30 ℃ cold air after extrusion, and cutting into master batches; s3, performing high-temperature solidification on the melt molding, performing investment molding on the master batch, controlling the temperature of a cylinder at 75-90 ℃, controlling the temperature of the heat preservation at 150-160 ℃ and controlling the heat preservation time at 20-200 minutes for solidification; S4, post-treatment, namely trimming and deburring the cured product, and curing for 2-4 hours at 160-170 ℃.
  2. 2. The production method of the composite material is characterized in that in the step S1, inorganic components comprise 28-32% of boron-silicon modified phenolic resin, 16-19% of basalt fiber, 18-21% of calcined kaolin, 16-19% of silicon micropowder, 6-8% of a mixture of zinc borate and ammonium molybdate, 2-3% of a phenolic special compatilizer, 2-3% of chopped aramid fiber, 2-3% of hexamethylenetetramine and 1-2% of high-temperature calcium stearate, and the mass ratio of the mixture of zinc borate and ammonium molybdate is 2:1.
  3. 3. The method according to claim 1, wherein in step S2, the raw materials are mixed in a low-speed high-speed mixer at a mixing speed of 200-800r/min for 20-28 minutes, and the temperature of the twin-screw extruder is set to 65-70 ℃ in a feeding section, 75-80 ℃ in a compression section, 85-90 ℃ in a plasticizing section, 85-90 ℃ in a homogenizing section and 80-85 ℃ in a machine head.
  4. 4. The production method according to claim 1, wherein in step S3, the master batch is extrusion molded in an extruder, the barrel temperature is controlled in three stages, a front stage of 85-90 ℃, a middle stage of 80-85 ℃ and a rear stage of 75-80 ℃, and the screw speed of the extruder is 40-120r/min.
  5. 5. The production method according to claim 1, wherein in step S3, the master batch is injection molded in an injection molding machine, the barrel temperature is controlled in three stages, the front stage is 85-90 ℃, the middle stage is 80-85 ℃, the rear end is 75-80 ℃, the injection pressure of the injection molding machine is 90-120MPa, the holding pressure is 60-80MPa, and the holding time is 10-30 seconds.
  6. 6. The method of claim 1, wherein the master batch is sieved through a 6-10 mesh sieve after preparation and vacuum dried at 100-120 ℃ for 24-26 hours.
  7. 7. The method of claim 1, wherein the material prepared by the method is nonflammable, flame propagation free, and carbon layer intact for 60 minutes at 850 ℃.
  8. 8. The production equipment of the marine electrical fireproof material is characterized by comprising a low-speed high-speed mixer, a double-screw extruder, a cold and hot cutting granulator, a single-screw extruder or an injection molding machine, a mold and a high-temperature curing oven, wherein the production process of the production equipment for producing the fireproof material is the process method of any one of claims 1 to 7.

Description

Production method and equipment of marine electrical fireproof material Technical Field The invention relates to the field of marine fireproof materials, in particular to a production method and equipment of a marine electrical fireproof material. Background The ship sailing environment is special, the closed space is more, the fire risk is high, and the high temperature resistance of the fireproof material is severely required. In the prior art, marine fireproof materials have the following technical defects The master batch problem is that the existing master batch preparation process is mainly designed for thermoplastic resin, and thermosetting resin is easy to be cured in advance in the traditional granulating process. Once the curing reaction of thermosetting materials such as phenolic resin is opened, the curing reaction is difficult to control, so that the problems of local overheating, incomplete curing or excessive curing and the like occur in the masterbatch preparation process, and the consistency of the product quality is seriously affected. The traditional thermosetting material technology is that the existing thermosetting fireproof material adopts a direct molding technology, and the flame retardant and the inorganic filler are unevenly dispersed in the resin matrix. In a high temperature environment, cracking and burning-through of the carbon layer due to local defects sometimes occurs. Research shows that uneven dispersion of the filler can lead to uneven heat conductivity distribution of the material at high temperature, form a heat bridge effect and seriously influence the fireproof performance. Disclosure of Invention The invention aims to provide a production method and equipment of a marine electrical fireproof material, which are used for solving the problems that the fireproof material in the prior art is cured in advance when master batches are prepared, and a flame retardant and an inorganic filler are unevenly dispersed in a resin. In order to achieve the above object, according to one aspect of the present invention, there is provided a method for producing an electrical fire-resistant material for a ship, comprising S1, drying raw materials, drying inorganic components at 120-150 ℃ for 4-6 hours, vacuum drying resins, compatibilizers, curing agents and the like at 80-100 ℃ for 3-4 hours, S2, preparing master batches at low temperature, mixing raw materials at not more than 60 ℃, then carrying out low-shear extrusion granulation by a twin-screw extruder, cooling by 20-30 ℃ cold air after extrusion, cutting into master batches, S3, carrying out high-temperature curing by melt molding, carrying out investment molding by controlling the temperature of the master batches at 75-90 ℃, controlling the temperature of the barrel at 150-160 ℃ and curing by controlling the time of the barrel at 20-200 minutes, S4, carrying out post-treatment, deburring and deburring the cured products, and curing at 160-170 ℃ for 2-4 hours. In the step S1, the inorganic components comprise 28-32% of boron-silicon modified phenolic resin, 16-19% of basalt fiber, 18-21% of calcined kaolin, 16-19% of silicon micropowder, 6-8% of a mixture of zinc borate and ammonium molybdate, 2-3% of a special phenolic compatilizer, 2-3% of chopped aramid fiber, 2-3% of hexamethylenetetramine, 1-2% of high-temperature calcium stearate and 2:1 of a mixture of zinc borate and ammonium molybdate. In step S2, the raw materials are mixed in a low-speed high-speed mixer in a sectional manner, the mixing rotating speed is 200-800r/min, the mixing time is 20-28 minutes, and the temperature of the double-screw extruder is set to 65-70 ℃ in a feeding section, 75-80 ℃ in a compression section, 85-90 ℃ in a plasticizing section, 85-90 ℃ in a homogenizing section and 80-85 ℃ in a machine head. Further, in the step S3, the master batch is extruded and molded in an extruder, the temperature of a charging barrel is controlled in three sections, the temperature of the front section is 85-90 ℃, the temperature of the middle section is 80-85 ℃, the temperature of the rear end is 75-80 ℃, and the rotating speed of a screw rod of the extruder is 40-120r/min; further, in step S3, the master batch is injection molded in an injection molding machine, the temperature of the charging barrel is controlled in three sections, the front section is 85-90 ℃, the middle section is 80-85 ℃, the rear end is 75-80 ℃, the injection pressure of the injection molding machine is 90-120MPa, the holding pressure is 60-80MPa, and the holding time is 10-30 seconds. Further, the master batch is subjected to 6-10 mesh screening after preparation and vacuum-dried at 100-120 ℃ for 24-26 hours. Further, the material prepared by the method is not burnt at a high temperature of 850 ℃ for 60 minutes, has no flame propagation and has complete carbon layer. According to another aspect of the invention, the production equipment of the marine electrical fireproof material comprise